The ruling in Citizens United v. FEC, decided January 2010, is best described this way: by a 5–4 vote, the Supreme Court held that the First Amendment prohibits the government from restricting independent political spending by corporations and labor unions. The decision struck down Section 203 of the Bipartisan Campaign Reform Act of 2002, which had barred corporations and unions from using their general treasury funds to pay for broadcast ads mentioning a federal candidate in the weeks before an election. Direct contributions to candidates remained illegal, and disclosure rules for political advertising were upheld by a separate 8–1 vote.
What the Court Held
Justice Anthony Kennedy wrote the majority opinion. Its central conclusion was that the ban on corporate-funded political broadcasts was a ban on speech, and that “political speech must prevail against laws that would suppress it, whether by design or inadvertence.”1Federal Election Commission. Citizens United v. FEC Corporations and unions, the Court said, may spend unlimited amounts from their treasuries on communications supporting or opposing candidates, as long as that spending is genuinely independent of any campaign.2Justia U.S. Supreme Court Center. Citizens United v. FEC, 558 U.S. 310 (2010)
An independent expenditure is one that advocates a candidate’s election or defeat but is not coordinated with any candidate, campaign, or political party.3Federal Election Commission. Making Independent Expenditures Coordination changes everything. Once a corporation’s spending is coordinated with a campaign, it stops being independent and falls under stricter contribution rules.
The First Amendment Reasoning
Two ideas carried the majority. First, the First Amendment protects speech regardless of the speaker’s identity. A corporation, a union, a nonprofit, and an individual receive the same constitutional protection when engaging in political expression, and restricting speech based on the speaker’s corporate form amounted to government censorship favoring some speakers over others.1Federal Election Commission. Citizens United v. FEC
Second, the Court built on Buckley v. Valeo (1976), which established that spending money to communicate a political message is itself protected speech.4Justia U.S. Supreme Court Center. Buckley v. Valeo, 424 U.S. 1 (1976) Because reaching an audience costs money, capping spending caps speech. Buckley had drawn a line between direct contributions to candidates, which Congress could limit, and independent expenditures, which it could not. Citizens United carried that reasoning over to corporate and union speakers.
Applying strict scrutiny, the Court found the government’s anti-corruption interest insufficient to justify the ban. The majority defined corruption narrowly, as quid pro quo exchange, and concluded that “independent expenditures, including those made by corporations, do not give rise to corruption or the appearance of corruption.”1Federal Election Commission. Citizens United v. FEC
What the Ruling Overturned
The decision explicitly overruled two prior cases. Austin v. Michigan State Chamber of Commerce (1990) had upheld a state ban on corporate independent expenditures on the theory that government could prevent wealthy corporations from distorting the political process.5Federal Election Commission. Austin v. Michigan State Chamber of Commerce The Citizens United majority rejected that “anti-distortion” rationale, holding that the government cannot suppress speech simply because the speaker has greater resources.
The Court also overruled the portion of McConnell v. Federal Election Commission (2003) that had upheld Section 203 of the BCRA. That section was declared unconstitutional.1Federal Election Commission. Citizens United v. FEC
The Dissent
Justice John Paul Stevens wrote a 90-page dissent joined by Justices Ginsburg, Breyer, and Sotomayor. Stevens argued that the Framers never intended constitutional speech protections to apply to corporations the same way they apply to individual citizens; corporations are legal creations of the state, and government has long regulated corporate activity in ways that would be unconstitutional if applied to people.
Stevens also rejected the majority’s narrow definition of corruption. In his view, corruption includes subtler forms of influence, such as the risk that heavy corporate spending would make elected officials beholden to their largest financial backers even without an explicit deal. He warned the ruling would “unleash the floodgates” of corporate money into elections.2Justia U.S. Supreme Court Center. Citizens United v. FEC, 558 U.S. 310 (2010)
What the Ruling Did Not Change
Citizens United is often misread as opening the door to unlimited corporate giving of every kind. It did not. Several restrictions survived intact.
Federal law still prohibits corporations and labor unions from contributing treasury funds directly to candidates’ campaigns.6Federal Election Commission. Who Can and Can’t Contribute The same ban applies to contributions to party committees at every level.7Federal Election Commission. Who Can and Can’t Contribute to a Party Committee To give directly, corporations and unions must operate a separate segregated fund, or PAC, funded by voluntary individual donations rather than treasury money.
Federal law also continues to bar foreign nationals from making any contribution, donation, or independent expenditure in connection with any federal, state, or local election.8GovInfo. 52 USC 30121 – Contributions and Donations by Foreign Nationals Nothing in Citizens United disturbed that prohibition.
By an 8–1 vote, the Court upheld the BCRA’s disclosure and disclaimer requirements. The government has a strong interest, the majority found, in ensuring voters know who is paying for political messages. Any televised electioneering communication must include a disclaimer identifying who paid for it and whether a candidate authorized it. FEC rules effective since March 2023 extend those requirements to paid digital political ads. Text or image ads must display a disclaimer visible without clicking, in a type size at least as large as the majority of other text; video ads must display it on screen for at least four seconds.9Federal Register. Internet Communication Disclaimers and Definition of Public Communication
What Changed in Practice
Citizens United set the constitutional principle. A federal appeals court decision two months later built the vehicle that reshaped election spending. In SpeechNow.org v. FEC (2010), the D.C. Circuit reasoned that if independent expenditures cannot be limited, then contributions to groups that only make independent expenditures cannot be limited either.10Federal Election Commission. SpeechNow.org v. FEC That produced the independent expenditure-only committee, known as the Super PAC.
Super PACs can raise unlimited amounts from individuals, corporations, unions, and other PACs, and spend that money on ads and other communications supporting or opposing candidates. They cannot contribute directly to candidates or coordinate with campaigns, and they must register with the FEC and report their donors and expenditures.11Federal Election Commission. Political Action Committees (PACs) In the 2023–2024 cycle, more than 2,500 Super PACs reported total receipts above $5 billion and independent expenditures of roughly $2.7 billion.
The ruling applies to state elections as well. In American Tradition Partnership, Inc. v. Bullock (2012), the Court summarily reversed a Montana Supreme Court decision that had upheld a century-old state ban on corporate election spending. The Court stated “there can be no serious doubt” that Citizens United controls, and no state can bar independent corporate political expenditures regardless of its history with corporate influence.12Justia U.S. Supreme Court Center. American Tradition Partnership, Inc. v. Bullock
The disclosure side of the ruling has proven less complete than the 8–1 vote suggested. Tax-exempt social welfare organizations under Section 501(c)(4) of the Internal Revenue Code can engage in political activity so long as it is not their primary purpose. When these groups fund political ads, the disclaimer identifies the group, but their underlying donors generally remain hidden. The FEC requires disclosure of the entity making the expenditure, not the individuals who financed it. Critics call the resulting flow of untraceable money “dark money”; defenders describe donor privacy as itself a First Amendment interest. Either way, the Court’s endorsement of transparency has not always translated into voters being able to identify who ultimately paid for a message.