Citizens United v. FEC is the 2010 Supreme Court decision that struck down federal limits on independent political spending by corporations and unions, holding 5–4 that the First Amendment bars the government from restricting political speech based on the speaker’s corporate identity. The ruling left direct contributions to candidates capped and left disclosure rules in place, but it opened the door to unlimited independent spending and to the Super PACs that now dominate outside spending in federal elections.
How the Case Started
Citizens United is a nonprofit corporation. In the run-up to the 2008 presidential primaries, it produced a ninety-minute documentary called Hillary: The Movie about then-candidate Hillary Clinton, and it planned to distribute the film through video-on-demand and to run television ads promoting it within thirty days of the primary elections.1Legal Information Institute. Citizens United v Federal Election Commission
Federal election law at the time barred corporations from using their general treasury funds to pay for broadcast messages that named a federal candidate close to an election. The Federal Election Commission took the position that both the film and its ads fell inside that prohibition. Citizens United sued, asking a federal court to declare the restrictions unenforceable against its documentary. The Supreme Court took the case and used it to reconsider whether the government could restrict corporate political spending at all.
The Law at Issue
The statute in dispute was Section 203 of the Bipartisan Campaign Reform Act, better known as McCain-Feingold. It prohibited corporations and labor unions from spending general treasury money on “electioneering communications.”2Cornell Law School / Legal Information Institute (LII). Bipartisan Campaign Reform Act of 2002 An electioneering communication was any broadcast, cable, or satellite message referring to a clearly identified federal candidate that aired within sixty days of a general election or thirty days of a primary.3Congress.gov. Campaign Finance Contribution Limits and Source Restrictions
Corporations and unions that wanted to participate in that kind of election-season messaging had to set up separate political action committees funded by voluntary individual donations. The Supreme Court had already upheld the electioneering restriction in McConnell v. FEC (2003) as applied to speech that was the functional equivalent of advocating for or against a candidate.
What the Supreme Court Held
Justice Anthony Kennedy wrote the majority opinion, joined by Chief Justice Roberts and Justices Scalia, Alito, and Thomas.4Justia. Citizens United v FEC, 558 US 310 (2010) The Court held that the government cannot restrict political speech on the basis of the speaker’s corporate identity. The First Amendment protects the speech, the majority reasoned, and that protection does not fall away because the speaker is an organization rather than a person.5Legal Information Institute. Citizens United v Federal Election Commission
Central to the ruling was a distinction between independent expenditures and direct contributions. Spending made independently of a candidate, the majority concluded, does not carry the same risk of quid pro quo corruption as money handed to a campaign. Without a strong enough anticorruption interest, the ban on corporate independent spending could not survive First Amendment scrutiny.5Legal Information Institute. Citizens United v Federal Election Commission
The decision overturned Austin v. Michigan Chamber of Commerce (1990), which had allowed restrictions on corporate treasury spending on politics, and it overruled the part of McConnell that had sustained BCRA’s electioneering ban as applied to corporate independent expenditures.5Legal Information Institute. Citizens United v Federal Election Commission
What the Dissent Argued
Justice John Paul Stevens wrote the dissent, joined by Justices Ginsburg, Breyer, and Sotomayor.4Justia. Citizens United v FEC, 558 US 310 (2010) Stevens argued that the majority had reached out to decide broad constitutional questions the case did not require, when narrower grounds could have resolved the specific complaint.
He also rejected the majority’s premise that corporations and individual citizens stand on the same footing under the First Amendment. Corporations are creatures of state law, and the government had long regulated their role in elections without constitutional trouble. Stevens rejected the majority’s narrow definition of corruption, contending that Congress had a legitimate interest in preventing the broader corrosive effects of large-scale corporate spending on public confidence in elections.6Legal Information Institute. Citizens United v Federal Election Commission – Stevens Dissent Allowing unlimited treasury spending, the dissent warned, would overwhelm ordinary voters and create the appearance that officials are beholden to their biggest financial supporters.
What Citizens United Did Not Change
The ruling left several things in place, and readers often assume otherwise.
The ban on direct corporate and union contributions to candidate campaigns still stands.7Federal Election Commission. Citizens United v FEC Organizations may spend without limit independently, but they still cannot write checks directly to a candidate’s committee, and individual contribution limits to candidates remain.
Disclosure survived as well. By an 8–1 vote, with only Justice Thomas in dissent, the Court upheld the transparency rules that require political advertisers to identify themselves.8Legal Information Institute. Citizens United v Federal Election Commission – Thomas Concurrence and Dissent The majority found that disclosure helps voters weigh who is behind a message and does not stop anyone from speaking. Anyone other than a political committee who makes independent expenditures totaling more than $250 in a calendar year must file a report with the FEC.9Office of the Law Revision Counsel. 52 USC 30104 – Reporting Requirements Political ads must also include disclaimers naming who paid for them and stating whether a candidate authorized them.10Federal Election Commission. Advertising and Disclaimers
The Line Between Independent and Coordinated Spending
Because the whole ruling turns on independence, the legal line between an independent expenditure and a coordinated one carries real weight. If spending is coordinated with a candidate, it is treated as a contribution and becomes subject to the source and dollar limits that apply to direct donations. The FEC uses a three-part test, and all three parts must be met:
- Payment: someone other than the candidate or the candidate’s authorized committee paid for the communication.
- Content: the communication is an electioneering communication, expressly advocates for or against a candidate, or meets other specified content standards.
- Conduct: the payer interacted with the candidate or campaign in defined ways, such as the campaign requesting or suggesting the communication, being materially involved in creating it, engaging in substantial discussion about it, or sharing a common vendor or former employee with the payer.
If all three are satisfied, the spending is legally a contribution rather than an independent expenditure.11Federal Election Commission. Coordinated Communications That is why groups that make large independent expenditures maintain a strict operational separation from the campaigns they support.
Super PACs and the SpeechNow Decision
Citizens United freed the spending side. A federal appeals court then freed the fundraising side. In SpeechNow.org v. FEC (2010), the D.C. Circuit reasoned that if there was no anticorruption interest in limiting independent expenditures, there could be no anticorruption interest in limiting contributions to groups that made only independent expenditures. The court struck down federal caps on donations to such groups.12Federal Election Commission. SpeechNow.org v FEC (Appeals Court)
Later that year, the FEC formally recognized a new category of committee: the independent-expenditure-only committee, commonly called a Super PAC. Super PACs may accept unlimited contributions from individuals, corporations, unions, and other political committees, though not from foreign nationals or federal contractors. They must register with the FEC and file the same reports as other political committees.13Federal Election Commission. AO 2010-11 In the 2023–2024 federal cycle alone, more than 2,500 registered Super PACs reported over $5 billion in total receipts.
Dark Money Through 501(c)(4) Groups
Super PACs must publicly report their donors. A parallel channel does not. Tax-exempt social welfare organizations under Section 501(c)(4) of the Internal Revenue Code may engage in political activity so long as it is not their primary purpose, and since 2018 they have not been required to report the names and addresses of their contributors to the IRS on their annual returns.14Internal Revenue Service. Social Welfare Organizations A 501(c)(4) can also donate to a Super PAC. The Super PAC then discloses the 501(c)(4) as a contributor, but the people who funded the 501(c)(4) remain undisclosed. This is what commentators mean by “dark money.”
Fifteen years after the decision, Citizens United continues to define the shape of federal campaign finance: unlimited independent spending, capped and disclosed direct contributions, and a coordination rule that keeps the two sides apart on paper even as the practical distance narrows.