History of Dark Money in Politics

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History of Dark Money in Politics

Origins of Campaign Finance Regulation

The history of dark money in American politics begins with earlier efforts to limit the influence of wealthy interests, corporations, and political machines. The Tillman Act of 1907 banned corporate contributions to national political campaigns, marking one of the first federal attempts to separate corporate money from elections. Later reforms, especially after Watergate, led to the Federal Election Campaign Act amendments of 1974, which created the Federal Election Commission and strengthened disclosure and contribution limits.

These reforms established the basic framework for modern campaign finance law. However, later court decisions gradually weakened restrictions on political spending, especially spending that was considered independent from candidates and campaigns.

Buckley, Soft Money, and Issue Advocacy

The Supreme Court’s 1976 decision in Buckley v. Valeo created a lasting distinction between campaign contributions and campaign expenditures. Contribution limits were generally upheld, but limits on independent spending were treated more skeptically under the First Amendment. This distinction became central to later dark money controversies.

By the 1990s and early 2000s, political parties and outside groups increasingly used soft money and issue advocacy to influence elections while avoiding some campaign finance limits. The Bipartisan Campaign Reform Act of 2002, also known as McCain-Feingold, attempted to curb soft money and regulate electioneering communications. Yet later court rulings narrowed those rules and opened new paths for outside political spending.

Citizens United and the Modern Dark Money Era

The 2010 Supreme Court decision in Citizens United v. Federal Election Commission became the defining turning point in the modern history of dark money. The Court ruled that corporations and unions could spend unlimited amounts on independent political expenditures. Soon after, the SpeechNow.org v. FEC decision helped create super PACs, which can raise and spend unlimited sums as long as they do not coordinate directly with candidates.

Super PACs must disclose donors, but politically active nonprofits such as 501(c)(4) social welfare organizations and 501(c)(6) business leagues can often spend on politics without publicly revealing their original funders. This created a system where money could move through opaque nonprofit networks before appearing in elections, making it difficult for voters to know who was financing political messages.

Political Nonprofits and Donor Secrecy

Dark money commonly flows through nonprofit organizations that are allowed to engage in political activity while keeping donors hidden from the public. These groups often present themselves as social welfare organizations, business leagues, or advocacy groups. They may run issue ads, electioneering communications, or transfer money to super PACs.

The controversy is not only about the amount of money spent, but also about secrecy. When donors are hidden, voters cannot easily judge whether a political message is backed by corporations, billionaires, unions, ideological networks, foreign-linked interests, or other powerful actors. Campaign finance watchdogs argue that this secrecy weakens democratic accountability.

Election Cycles and the Growth of Outside Spending

Dark money became a major national issue in the 2012 election, when politically active nonprofits spent heavily after Citizens United. Reports from OpenSecrets, ProPublica, the Center for Public Integrity, and the Brennan Center documented how nonprofit groups became major outside spenders while shielding donors.

The pattern continued through later election cycles. In 2014 and 2016, dark money became a routine feature of congressional and federal elections. In 2018 and 2020, both conservative and progressive networks used nonprofit structures to shape campaigns. The 2020 election cycle saw record political spending, with dark money and hidden donor channels playing a major role in presidential, congressional, and issue campaigns.

By 2024 and 2025, dark money remained deeply embedded in the broader campaign finance system, connected to super PACs, political advertising, judicial races, ballot measures, and state-level campaigns.

IRS Oversight and Enforcement Problems

A major part of dark money history involves the Internal Revenue Service, which oversees tax-exempt nonprofits. The IRS has long struggled to define and enforce how much political activity a 501(c)(4) social welfare organization may conduct. After the Tea Party targeting controversy in the early 2010s, IRS enforcement became politically sensitive and weakened.

Investigations by ProPublica and other outlets showed that politically active nonprofits often operated with little oversight. Some groups received nonprofit approval after years of delay, while others spent heavily in elections without disclosing donors. A 2026 Guardian report on an IRS disclosure problem involving state-level 527 political organizations showed that even legally reportable political money can become difficult to track when disclosure systems fail.

FEC Deadlock and Weak Federal Regulation

The Federal Election Commission is responsible for enforcing federal campaign finance law, but it has often been criticized for partisan deadlock and limited enforcement. Former commissioners and reform groups have argued that weak FEC action allows outside groups to push the boundaries of coordination, disclosure, and political spending rules.

This enforcement weakness has helped dark money groups operate in a gray area. Even when disclosure rules exist, delayed reporting, nonprofit transfers, shell entities, and limited penalties can make it difficult to identify the true source of political spending before voters cast ballots.

Disclosure Reform and Transparency Battles

Reformers have repeatedly proposed stronger disclosure laws to address dark money. The DISCLOSE Act, first introduced after Citizens United, sought to reveal major donors behind political spending by corporations, unions, and outside groups. Later reform proposals, including the For the People Act, also included campaign finance transparency provisions.

Supporters of disclosure argue that transparency allows voters to evaluate political messages and detect conflicts of interest. Opponents argue that donor privacy protects free association and prevents harassment. This tension between transparency and privacy remains central to dark money debates.

State, Judicial, and Ballot Measure Dark Money

Dark money is not limited to federal elections. State races, ballot measures, and judicial elections have become major targets for undisclosed spending. Outside groups can influence state supreme court elections, ballot initiatives, and local policy fights with limited public knowledge of who is funding the campaigns.

Arizona’s Proposition 211, the Voters’ Right to Know Act, became an important state-level disclosure reform after voters approved it in 2022. It showed that states can sometimes act where federal reform has stalled. Other states continue to debate donor disclosure, nonprofit spending, and transparency in ballot measure campaigns.

Major Donor Networks and Political Organizations

Dark money debates often focus on major donor networks and politically active organizations. Conservative networks connected to groups such as Americans for Prosperity, the Judicial Crisis Network, and the U.S. Chamber of Commerce have played prominent roles in outside spending and judicial politics. Progressive networks, including the Sixteen Thirty Fund, have also become central to modern dark money debates.

The rise of large nonprofit networks on both the right and the left shows that dark money is not confined to one party. Instead, it has become a structural feature of modern American politics.

Digital Ads and New Campaign Tactics

The growth of digital advertising has added new challenges. Online political ads can be targeted, temporary, and difficult to monitor. Disclosure rules developed for television and print often lag behind digital campaign tactics. Researchers have found that outside groups hiding donors can play a major role in negative political advertising, especially online.

As campaigns increasingly rely on social media, streaming platforms, and data-driven targeting, the problem of dark money becomes harder to track. The question is no longer only who pays for television ads, but who funds the digital messages voters see every day.

Why Dark Money Matters

Dark money matters because it affects public trust, political accountability, and democratic decision-making. When voters cannot see who is funding political messages, they cannot fully evaluate the motives behind those messages. Hidden funding can allow wealthy donors, corporations, ideological networks, and special interests to influence elections without public scrutiny.

Public opinion research shows that many Americans are concerned about the role of money in politics. The persistence of dark money reflects a broader conflict between free speech, donor privacy, anti-corruption rules, and the public’s right to know who is trying to influence elections.

Conclusion

The history of dark money in politics is the history of campaign finance law, court decisions, nonprofit regulation, disclosure loopholes, and political adaptation. From the Tillman Act and post-Watergate reforms to Citizens United, super PACs, political nonprofits, and digital advertising, each stage created new rules and new ways around them.

Dark money remains one of the most important unresolved issues in American democracy. Reformers continue to call for stronger disclosure, better IRS and FEC enforcement, and clearer rules for nonprofit political spending. Critics of regulation warn against restricting political speech and donor privacy. The central question remains whether voters can meaningfully govern themselves when major sources of political influence remain hidden.

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IRS glitch masked $51m in political donations, finance watchdog says

| The Guardian | The Guardian | March 20, 2026 This report covers an IRS disclosure problem affecting state-level 527 political organizations, showing how even legally reportable money can become functionally opaque when reporting systems fail.

How the left’s dark money behemoth spent its millions

| Politico | Politico | November 14, 2025 This article examines Sixteen Thirty Fund spending and illustrates how dark-money-style nonprofit networks became a major force on the Democratic and progressive side of modern politics.

Dark money and foreign influence: what voters need to know

| Campaign Legal Center | Campaign Legal Center | 2024 This article explains how opaque funding channels can complicate enforcement of laws restricting foreign influence in U.S. elections.

Dark Money Groups Are Hiding Their Donors From Voters

| Campaign Legal Center | Campaign Legal Center | 2024 This Campaign Legal Center piece argues that donor secrecy prevents voters from evaluating who is behind political advertising and advocacy.

Americans’ Views on Money in Politics

| Pew Research Center | Pew Research Center | September 23, 2021 This survey report provides public opinion context for why undisclosed campaign spending and wealthy donor influence remain persistent concerns.

As Dark Money Floods U.S. Elections, Regulators Turn a Blind Eye

| Newsweek | Newsweek | September 30, 2014 This article examines regulatory weakness and the role of undisclosed political spending in the years after Citizens United.

Core Explainers and Data Resources

Citizens United, Explained

| Brennan Center for Justice | Brennan Center for Justice | January 14, 2025 This explainer summarizes the Supreme Court’s Citizens United ruling and explains why it is widely treated as a turning point in the rise of unlimited outside spending and dark money.

Dark Money

| Brennan Center for Justice | Brennan Center for Justice | 2025 This topic page gathers Brennan Center materials on undisclosed political spending, including the post-Citizens United expansion of nonprofit election spending.

Money in Politics

| Brennan Center for Justice | Brennan Center for Justice | 2025 This resource page places dark money within the broader history of campaign finance, disclosure, outside spending, and democracy reform.

Outside Spending

| OpenSecrets | OpenSecrets | 2025 This database tracks independent expenditures and outside political spending, allowing users to compare disclosed super PAC spending with spending by groups that hide donors.

Dark Money Basics

| OpenSecrets | OpenSecrets | 2025 This explainer defines dark money, explains how politically active nonprofits operate, and shows why donor disclosure gaps matter in federal elections.

Dark Money Spending by Election Cycle

| OpenSecrets | OpenSecrets | 2025 This OpenSecrets resource shows which dark money groups spent the most in recent election cycles, helping trace the growth of undisclosed political spending after 2010.

Outside Spending by Disclosure

| OpenSecrets | OpenSecrets | 2025 This OpenSecrets chart separates outside spending by donor-disclosure status, making it useful for tracking the historical rise and fluctuation of dark money.

Campaign Finance Data

| Federal Election Commission | FEC | 2024 This official database allows researchers to compare disclosed federal campaign finance records with spending routed through groups that disclose little or no donor information.

Independent Expenditures

| Federal Election Commission | FEC | 2024 This FEC guide explains independent expenditures, the legal category that expanded dramatically after Citizens United and SpeechNow.

Electioneering Communications

| Federal Election Commission | FEC | 2024 This FEC guide explains electioneering communications, a disclosure category created before Citizens United and often central to dark money reporting disputes.

Coordinated Communications

| Federal Election Commission | FEC | 2024 This FEC resource explains coordination rules, which matter because supposedly independent spending can become legally problematic when campaigns and outside groups coordinate.

The Campaign Finance Landscape After Citizens United

| Campaign Legal Center | Campaign Legal Center | 2024 This educational resource explains how super PACs, nonprofits, and disclosure gaps fit together in the modern campaign finance system.

How to “Follow the Money” in a Political Campaign

| ProPublica | ProPublica | November 1, 2022 This guide explains campaign finance basics, including how super PACs, nonprofits, and disclosure rules interact in modern elections.

What is political “dark money” — and is it bad?

| Center for Public Integrity | Center for Public Integrity | January 28, 2022 This explainer defines dark money, identifies common vehicles such as nonprofits and LLCs, and explains the controversy over donor anonymity.

What Voters Should Know About Dark Money

| Campaign Legal Center | Campaign Legal Center | 2022 This explainer describes how dark money groups operate and why undisclosed spending can make political accountability more difficult.

Dark Money and Digital Ads

| Brennan Center for Justice | Brennan Center for Justice | 2021 This Brennan Center resource helps connect dark money history to online political advertising, where disclosure rules have often lagged behind campaign tactics.

How Dark Money Influences Elections

| Campaign Legal Center | Campaign Legal Center | 2020 This educational article explains the mechanics of dark money and shows why nondisclosure is a central problem in campaign finance accountability.

Dark Money Basics: What Is It and Why Does It Matter?

| Issue One | Issue One | 2018 This explainer defines dark money and describes the disclosure loopholes that allow politically active nonprofits to hide donors.

Election Cycles and Outside Spending

Super PACs

| OpenSecrets | OpenSecrets | 2024 This page tracks super PACs, which disclose donors but often receive money routed through opaque nonprofits, making them central to understanding “gray money” and dark money transfers.

Outside Spending, by Super PAC

| OpenSecrets | OpenSecrets | 2024 This database helps show how disclosed outside-spending groups can still be connected to undisclosed money when their funders include nonprofits or shell entities.

Political Ad Spending in 2024

| OpenSecrets | OpenSecrets | 2024 This OpenSecrets election coverage places dark money within the larger campaign finance environment of the 2024 federal election.

Buying Time 2024

| Brennan Center for Justice | Brennan Center for Justice | 2024 This resource tracks political television advertising and helps reveal the role of outside groups and opaque funders in election messaging.

Campaign Finance in the 2022 Midterms

| OpenSecrets | OpenSecrets | 2022 This OpenSecrets collection tracks money in the 2022 elections, including outside spending and dark money trends.

Outside Spending in the 2022 Election

| OpenSecrets | OpenSecrets | 2022 This data page shows outside spending in the 2022 cycle and helps researchers separate transparent PAC spending from darker nonprofit spending.

The Shadow Parties

| OpenSecrets | OpenSecrets | 2021 This OpenSecrets report examines networks of super PACs, nonprofits, and allied groups that function like party infrastructure while operating outside traditional party disclosure systems.

Secret Spending in the 2020 Election

| OpenSecrets | OpenSecrets | March 17, 2021 This article reports that dark money and hidden donor channels played a major role in the 2020 election cycle, including through transfers into super PACs.

The 2020 Election Saw Record Political Spending

| OpenSecrets | OpenSecrets | February 11, 2021 This article places dark money within the record-breaking 2020 campaign finance environment, where overall election spending reached unprecedented levels.

Facebook Political Ads And Accountability: Outside Groups Are Most Negative, Especially When Hiding Donors

| Shomik Jain and Abby K. Wood | arXiv | October 5, 2020 This academic paper analyzes Facebook political ads and finds that outside groups hiding donors were associated with more negative advertising.

Political nonprofits spent hundreds of millions in 2020

| OpenSecrets | OpenSecrets | October 2020 This article tracks politically active nonprofits during the 2020 cycle and explains how dark money spending can be difficult to connect to original donors.

Election Spending 2020: A Flood of Money

| OpenSecrets | OpenSecrets | 2020 This OpenSecrets resource tracks presidential election money and helps show how outside groups and donor secrecy fit into the 2020 campaign.

Dark Money in the 2020 Election

| Brennan Center for Justice | Brennan Center for Justice | 2020 This analysis explains how dark money remained influential in the 2020 cycle despite expanded scrutiny after Citizens United.

How Secret Donors Are Shaping the 2020 Election

| Issue One | Issue One | 2020 This article examines how wealthy donors and nonprofits shaped the 2020 election through opaque channels.

Ten Years After Citizens United

| Brennan Center for Justice | Brennan Center for Justice | 2020 This Brennan Center retrospective explains the decade-long effects of Citizens United on campaign spending, super PACs, and donor secrecy.

Citizens United at 10

| OpenSecrets | OpenSecrets | 2020 This OpenSecrets report reviews how outside spending, super PACs, and dark money changed American elections in the decade after the ruling.

A Decade of Citizens United

| Issue One | Issue One | January 2020 This Issue One analysis reviews the growth of outside spending and secret money during the first ten years after Citizens United.

"Dark money" group shelled out $141 million to liberal causes in 2018

| Axios | Axios | November 20, 2019 This article reports on Sixteen Thirty Fund spending in the 2018 election cycle and shows the growing use of dark money tactics by progressive groups.

Political nonprofits helped shape 2018 midterms

| OpenSecrets | OpenSecrets | February 2019 This article examines the role of political nonprofits in the 2018 midterms and shows how dark money remained important after several election cycles of scrutiny.

Dark Money and the 2018 Midterms

| Brennan Center for Justice | Brennan Center for Justice | 2018 This analysis explains how dark money continued to influence congressional and state races in the 2018 midterms.

Ten times more ‘dark money’ has been spent for 2016 elections

| PolitiFact | PolitiFact | November 5, 2015 This fact-check examines claims about dark money growth in the early 2016 cycle and places them in context using campaign finance data.

Dark Money in the 2014 Midterms

| OpenSecrets | OpenSecrets | November 2014 This article tracks undisclosed outside spending during the 2014 midterms and shows dark money becoming a routine feature of congressional elections.

The Dark Money Behind the 2014 Elections

| Center for Public Integrity | Center for Public Integrity | 2014 This report examines nonprofit and outside-group spending in the 2014 election cycle, emphasizing donor secrecy and negative advertising.

Dark Money Helped Shape 2012 Elections

| OpenSecrets | OpenSecrets | January 2013 This article reviews the 2012 election cycle, when undisclosed spending by politically active nonprofits became a major national campaign issue.

Shadow Money Magic

| Center for Public Integrity | Center for Public Integrity | 2012 This investigation examines the organizations and tactics behind opaque election spending during the 2012 campaign.

The Citizens United Effect

| OpenSecrets | OpenSecrets | 2012 This report-style resource explains how Citizens United changed outside spending and contributed to the rise of super PACs and dark money groups.

Nonprofit Spending in the 2012 Election

| ProPublica | ProPublica | 2012 This article examines how nonprofit groups without full donor disclosure became major spenders in the 2012 election.

Dark Money Groups Outspend Super PACs

| ProPublica | ProPublica | 2012 This article highlights the role of politically active nonprofits as major outside spenders shortly after Citizens United and SpeechNow.

Nonprofits, IRS Oversight, and Enforcement

Political Nonprofits

| OpenSecrets | OpenSecrets | 2025 This database focuses on nonprofits involved in politics, especially 501(c)(4) and 501(c)(6) groups that can influence elections without publicly naming donors.

527s

| OpenSecrets | OpenSecrets | 2025 This resource explains and tracks 527 political organizations, a related form of political money that differs from darker nonprofit spending because donor disclosure rules are different.

Political nonprofits and donor secrecy

| Internal Revenue Service | IRS | 2024 This IRS page explains social welfare organizations, the 501(c)(4) category often used by politically active nonprofits that do not publicly disclose donors.

Business leagues and political influence

| Internal Revenue Service | IRS | 2024 This IRS page explains 501(c)(6) business leagues, another nonprofit category involved in political spending and lobbying without the same donor transparency as PACs.

Political Organizations

| Internal Revenue Service | IRS | 2024 This IRS resource explains political organizations, including 527 groups, and helps distinguish disclosed political entities from darker nonprofit spending vehicles.

Dark Money Groups Operate With Impunity While The Government Does Nothing

| Campaign Legal Center | Campaign Legal Center | May 6, 2022 This article argues that politically active 501(c)(4) organizations exploit weak enforcement to spend heavily in elections while avoiding donor disclosure.

How the IRS Gave Up Fighting Political Dark Money Groups

| ProPublica | ProPublica | April 18, 2019 This investigation explains how IRS enforcement weakened after the Tea Party targeting controversy, allowing politically active nonprofits to operate with little oversight.

Departing the Federal Election Commission

| Ann Ravel | Medium | February 19, 2017 Former FEC commissioner Ann Ravel criticizes weak enforcement and partisan deadlock at the agency responsible for campaign finance regulation.

IRS Grants Nonprofit Status to ‘Dark Money’ Group Crossroads GPS

| ProPublica | ProPublica | February 9, 2016 This article reports that Crossroads GPS received IRS nonprofit approval years after applying, preserving donor secrecy for a major conservative political group.

IRS scandal tax-exempt Tea Party political groups

| Time | Time | July 7, 2014 This article explains IRS changes after the Tea Party targeting controversy, a key episode in the history of nonprofit political oversight.

What Newly Released Docs Tell Us About the IRS and How It Handles Dark Money

| ProPublica | ProPublica | April 9, 2014 This article explains the political fight over IRS review of nonprofit applications and how that controversy affected dark money enforcement.

The IRS and Political Nonprofits

| ProPublica | ProPublica | 2014 This investigative series covers the IRS, tax-exempt groups, and politically active nonprofits in the aftermath of the Tea Party targeting controversy.

Social Welfare Groups and Political Activity

| Internal Revenue Service | IRS | November 26, 2013 This IRS notice explains proposed rules for political activity by 501(c)(4) social welfare organizations, reflecting post-Citizens United pressure on the tax agency.

The IRS Tea Party Controversy

| Treasury Inspector General for Tax Administration | TIGTA | May 14, 2013 This audit report became central to the controversy over IRS handling of nonprofit applications and reshaped enforcement politics around dark money groups.

The Hidden Life of 501(c)(4) Groups

| ProPublica | ProPublica | 2010 This explainer describes the nonprofit category that became one of the most important vehicles for post-Citizens United dark money.

Disclosure Reform and Transparency Battles

The For the People Act and Campaign Finance Disclosure

| Brennan Center for Justice | Brennan Center for Justice | 2024 This explainer describes proposed disclosure and anti-corruption reforms, including provisions aimed at dark money in politics.

The DISCLOSE Act

| Brennan Center for Justice | Brennan Center for Justice | 2024 This article explains the DISCLOSE Act as a recurring federal reform proposal designed to reveal major donors behind election spending.

The Attack on Disclosure Laws

| Campaign Legal Center | Campaign Legal Center | 2022 This article discusses legal and political challenges to donor-disclosure requirements and the consequences for transparency.

Dark Money and Disclosure After Citizens United

| Campaign Legal Center | Campaign Legal Center | 2020 This retrospective marks the ten-year anniversary of Citizens United and reviews its role in expanding undisclosed outside spending.

Dark Money Illuminated

| Issue One | Issue One | September 24, 2018 This report identifies donors behind hundreds of millions of dollars in contributions to politically active nonprofits, showing that some dark money can be traced indirectly through tax filings.

Dark Money Illuminated Report Methodology

| Issue One | Issue One | September 24, 2018 This methodology page explains how researchers used nonprofit tax filings and other records to uncover donors to dark money groups.

Shedding Some Light on Dark Money Political Donors

| ProPublica | ProPublica | September 12, 2018 This ProPublica article describes efforts to make hidden political nonprofit donors more visible through data analysis and public records.

Supreme Court lets disclosure ruling take effect

| OpenSecrets | OpenSecrets | September 2018 This article covers a court development that temporarily expanded donor disclosure requirements for certain nonprofit political ads.

Dark Money, Black Hole Money, and How to Solve It

| Ciara Torres-Spelliscy | American Constitution Society | October 11, 2016 This report argues that dark money and “black hole money” threaten accountability and recommends stronger disclosure and regulatory enforcement.

The DISCLOSE Act of 2010

| U.S. Congress | Congress.gov | 2010 This bill was an early legislative response to Citizens United, seeking stronger disclosure for political spending by corporations, unions, and outside groups.

State, Judicial, and Ballot Measure Dark Money

Secret Spending in the States

| Brennan Center for Justice | Brennan Center for Justice | 2024 This report-style resource examines how dark money operates beyond federal elections, especially in state and local campaigns.

How Dark Money Shapes State Politics

| National Institute on Money in Politics | FollowTheMoney.org | 2024 This research hub provides state-level campaign finance data and reports useful for tracing undisclosed and difficult-to-track political influence.

Dark Money and the Courts

| Brennan Center for Justice | Brennan Center for Justice | 2024 This Brennan Center collection connects dark money to judicial elections, constitutional doctrine, and policy debates about disclosure.

Dark Money in Judicial Elections

| Brennan Center for Justice | Brennan Center for Justice | 2024 This resource shows how undisclosed spending affects state supreme court races, where outside groups can shape courts that later decide major policy issues.

A Rare Win in the Fight Against Dark Money

| The New Yorker | The New Yorker | November 22, 2022 This article covers Arizona’s Proposition 211, a donor-disclosure measure passed by voters as a state-level response to dark money.

Arizona voters pass sweeping campaign finance disclosure law

| Arizona Secretary of State | Arizona Secretary of State | 2022 This official state page explains Proposition 211, the Voters’ Right to Know Act, one of the most important recent state-level disclosure reforms.

Dark Money and Judicial Elections

| Brennan Center for Justice | Brennan Center for Justice | 2022 This report examines spending in judicial elections and shows how outside groups and undisclosed donors can influence court composition.

Dark Money and Ballot Measures

| National Institute on Money in Politics | FollowTheMoney.org | 2022 This report-style resource is useful for studying how undisclosed money influences ballot initiative campaigns, not just candidate elections.

Major Donor Networks and Political Organizations

Americans for Prosperity and Conservative Political Spending

| OpenSecrets | OpenSecrets | 2022 This profile tracks Americans for Prosperity, one of the best-known conservative nonprofit networks involved in outside spending and issue advocacy.

Sixteen Thirty Fund

| OpenSecrets | OpenSecrets | 2022 This OpenSecrets profile tracks the Sixteen Thirty Fund, a major progressive nonprofit that became central to modern debates over dark money on the left.

The Judicial Crisis Network

| OpenSecrets | OpenSecrets | 2022 This OpenSecrets profile tracks a conservative nonprofit prominent in judicial confirmation fights and debates over undisclosed influence on the courts.

The U.S. Chamber of Commerce

| OpenSecrets | OpenSecrets | 2022 This profile tracks the U.S. Chamber of Commerce, a 501(c)(6) organization long associated with major outside spending and donor secrecy debates.

"Dark money" group shelled out $141 million to liberal causes in 2018

| Axios | Axios | November 20, 2019 This article reports on Sixteen Thirty Fund spending in the 2018 election cycle and shows the growing use of dark money tactics by progressive groups.

The Dark Money ATM of the Conservative Movement

| Mother Jones | Mother Jones | February 2012 This article examines donor networks and nonprofit funding channels associated with conservative political advocacy.

Koch Brothers, Americans for Prosperity, and the Rise of Conservative Dark Money

| Jane Mayer | The New Yorker | August 30, 2010 This major article helped popularize public attention to wealthy donor networks, nonprofit advocacy groups, and undisclosed political influence.

Legal Foundations, Court Cases, and Statutes

The Supreme Court’s Campaign Finance Deregulation

| Brennan Center for Justice | Brennan Center for Justice | 2024 This resource connects Citizens United to later campaign finance cases that further limited regulation and strengthened outside spending rights.

Citizens United v. Federal Election Commission

| Oyez | Oyez | 2024 This case summary explains the constitutional reasoning behind Citizens United and its importance in the history of corporate and union independent expenditures.

SpeechNow.org v. Federal Election Commission

| Federal Election Commission | FEC | 2024 This FEC case page covers the decision that helped create super PACs, a key institutional development in the post-Citizens United outside spending system.

Citizens United v. FEC

| Federal Election Commission | FEC | 2024 This official FEC case page summarizes the Supreme Court decision that allowed corporations and unions to make unlimited independent expenditures.

McCutcheon v. Federal Election Commission

| Federal Election Commission | FEC | 2024 This FEC page explains the case that struck down aggregate limits on federal contributions, part of the broader campaign finance deregulation era.

Buckley v. Valeo

| Federal Election Commission | FEC | 2024 This FEC case page explains the 1976 decision that created the modern distinction between contributions and expenditures and shaped later dark money loopholes.

SpeechNow.org v. FEC

| U.S. Court of Appeals for the D.C. Circuit | D.C. Circuit | March 26, 2010 This decision allowed independent expenditure-only committees to raise unlimited contributions, helping create the super PAC system.

Citizens United v. Federal Election Commission

| Supreme Court of the United States | Supreme Court | January 21, 2010 This Supreme Court opinion struck down restrictions on corporate and union independent expenditures, opening the door to a new era of outside political spending.

Citizens United Decision

| Legal Information Institute | Cornell Law School | January 21, 2010 This case summary provides accessible legal context for the Citizens United ruling and its campaign finance implications.

FEC Advisory Opinion 2010-11: Commonsense Ten

| Federal Election Commission | FEC | 2010 This advisory opinion addressed independent-expenditure-only committees and helped formalize the legal environment for super PACs.

FEC Advisory Opinion 2010-09: Club for Growth

| Federal Election Commission | FEC | 2010 This FEC advisory opinion helped define how independent-expenditure-only political committees could operate after Citizens United and SpeechNow.

Federal Election Commission v. Wisconsin Right to Life

| Oyez | Oyez | June 25, 2007 This Supreme Court decision narrowed regulation of electioneering communications and weakened parts of the McCain-Feingold disclosure-and-advertising system before Citizens United.

Wisconsin Right to Life v. FEC

| Federal Election Commission | FEC | 2007 This FEC case page explains the ruling that made it easier for outside groups to run issue ads near elections.

McConnell v. Federal Election Commission

| Oyez | Oyez | December 10, 2003 This case upheld most of the Bipartisan Campaign Reform Act, including restrictions and disclosure rules that later faced erosion in Wisconsin Right to Life and Citizens United.

McConnell v. FEC

| Federal Election Commission | FEC | 2003 This FEC page summarizes the Supreme Court decision upholding major parts of McCain-Feingold before later campaign finance rulings reversed course.

Bipartisan Campaign Reform Act of 2002

| Federal Election Commission | FEC | March 27, 2002 This official resource explains the McCain-Feingold law, which tried to curb soft money and regulate electioneering communications before the later dark money era.

Soft Money and Issue Advocacy

| Federal Election Commission | FEC | 2002 This FEC resource explains reforms aimed at soft money and issue ads, the pre-Citizens United ancestors of later dark money controversies.

The Rise of Soft Money

| Brookings Institution | Brookings | 2002 This article places modern dark money in the longer history of soft money, party fundraising, and campaign finance reform debates.

527 Political Organizations and the 2000 Election

| OpenSecrets | OpenSecrets | 2000 This OpenSecrets database helps trace the use of 527 organizations before super PACs and politically active nonprofits became dominant.

Colorado Republican Federal Campaign Committee v. FEC

| Federal Election Commission | FEC | 1996 This case page explains party independent expenditures, an important step in the legal evolution of independent spending doctrine.

First National Bank of Boston v. Bellotti

| Oyez | Oyez | April 26, 1978 This Supreme Court case recognized corporate spending rights in ballot measure campaigns, an important precursor to Citizens United.

Buckley v. Valeo

| Oyez | Oyez | January 30, 1976 This case created the modern constitutional framework distinguishing campaign contributions from expenditures and limiting many campaign finance restrictions.

Federal Election Campaign Act Amendments of 1974

| Federal Election Commission | FEC | 1974 This official resource explains the post-Watergate reforms that created the FEC and modernized campaign finance disclosure and contribution limits.

Federal Election Campaign Act

| Federal Election Commission | FEC | 1971 This FEC resource explains the basic statutory framework for federal campaign finance law, including disclosure rules later tested by outside spending groups.

Tillman Act of 1907

| U.S. Senate | Senate Historical Office | 1907 This Senate history page covers the Tillman Act, the first federal law banning corporate contributions to national political campaigns and a starting point for the long history leading to Citizens United.