What is the Citizens United ruling?
January 21, 2010. 5-4. The Supreme Court ruled that corporations and unions have a First Amendment right to spend unlimited money on political advertising, as long as they do not coordinate with campaigns.
Citizens United v. FEC is a 2010 Supreme Court decision that struck down century-old restrictions on corporate and union political spending. The ruling treats political spending as protected speech under the First Amendment.
Key facts
- Outside spending grew 8x from 2008 to 2024, from $574M to $4.5B
- $2.6 billion from 100 billionaire families in 2024, about one of every six dollars spent on federal elections
- The FEC has punished zero candidates or groups for illegal coordination in 15 years
- About 2,500 super PACs raised $5.1 billion for the 2024 cycle
- 25 states have passed resolutions calling for a constitutional amendment to overturn the ruling
The ruling rested on two assumptions. First, that spending would be fully transparent. Second, that it would be genuinely independent of candidates. Neither held true. Fifteen years later, $1.9 billion in dark money flowed through channels designed to prevent exactly the transparency Justice Kennedy promised.
“A democracy cannot function effectively when its constituent members believe laws are being bought and sold.”
Justice John Paul Stevens, dissent in Citizens United v. FEC (2010)
The case started small. A conservative group called Citizens United wanted to air a film critical of Hillary Clinton before the 2008 primary. A law barred paid political broadcasts near elections. Rather than ruling narrowly, the Court struck down the underlying restrictions on corporate political spending entirely.
Where “money is speech” comes from
Not from Citizens United. It came from Buckley v. Valeo (1976). That case drew the line. Direct contributions to candidates can be limited, but independent spending gets First Amendment protection. Citizens United extended that principle to corporations in 2010. McCutcheon v. FEC (2014) struck down the aggregate cap on what one donor could give in total. In NRSC v. FEC (2026), the Court voted 6-3 to strike down 50-year-old limits on how much party committees can spend in coordination with their own candidates. Each ruling widened who could spend, how much, and with less disclosure.
What Is the Difference Between a PAC and a Super PAC?
The Citizens United ruling led directly to the creation of super PACs. In 2010, a federal appeals court ruled that outside groups could accept unlimited contributions as long as they did not give directly to candidates.
PAC vs. super PAC: what each can and cannot do
| Rule | Traditional PAC | Super PAC |
|---|---|---|
| Can donate directly to candidates? | Yes, up to $5,000 per election | No, prohibited |
| Can coordinate with campaigns? | Yes, allowed | No, strictly prohibited |
| Donation limits? | Capped at $5,000/year from individuals | Unlimited from individuals, corporations, unions |
| Can accept corporate money? | No | Yes, for independent expenditures |
| Must disclose donors? | Yes | Yes, but donors can include dark money groups that hide original sources |
The only rule governing super PACs is independence from campaigns. The FEC has never brought an enforcement action for illegal coordination. Super PACs can voluntarily adopt a “firewall policy” to separate staff who contact candidates from staff making ads, but the FEC draws no negative inference from groups that skip this step entirely. In practice, super PACs are routinely run by former top aides of the candidates they support. The independence is legal fiction.
Outside Spending Has Grown Nearly Eightfold Since 2008
Outside spending in federal elections grew from $574 million in 2008 to $4.5 billion in 2024. Nearly eight times as much. The 2008 cycle was the last before Citizens United, and every cycle since has set a new record.
| Period | Value |
|---|---|
| 2008 (last pre-CU cycle) | $574M |
| 2024 (record) | $4.5B |
| Change | Nearly 8x |
| Category | Value |
|---|---|
| 2008 | $B0.57 |
| 2010 | $B0.31 |
| 2012 | $B1.04 |
| 2016 | $B1.41 |
| 2020 | $B2.91 |
| 2024 | $B4.5 |
Excludes party spending. Source: OpenSecrets.
Billionaire election spending is up 160x since Citizens United. One hundred billionaire families spent $2.6 billion on the 2024 election, about one of every six dollars spent by all candidates, parties, and committees. That giving climbed from roughly $16 million to $2.6 billion over that span. Republicans received 70% of it, and 80% flowed through super PACs.
| Period | Value |
|---|---|
| 2006 (pre-CU) | <$5M |
| 2024 | $1.9B |
| Change | 380x increase |
20% of super PAC donations in 2024 came from entities that don’t disclose their donors. In 2012, that figure was 1%.
The 0.02% Who Fund American Elections
The top 100 super PAC donors gave 73% of all super PAC money. They are 0.02% of all individual donors.
The six biggest donors in 2024 each gave $100 million or more, all to Republicans.
| Category | Value |
|---|---|
| Elon Musk | $M291 |
| Timothy Mellon | $M165 |
| Miriam Adelson | $M100 |
| Richard Uihlein | $M100 |
| Ken Griffin | $M100 |
| Jeff Yass | $M100 |
Musk's $291M ≈ 2% of all federal election spending from one person. Griffin, Yass, Adelson, and the Uihleins each gave $100M or more. Source: OpenSecrets.
In 2025, the Wisconsin Supreme Court race became the most expensive judicial election in U.S. history, topping $100 million. Elon Musk’s groups alone spent more than $20 million. State supreme courts decide redistricting and voting rights, so $100 million to shape who draws the maps for a decade is a bargain for the spenders.
The FEC Cannot Enforce the One Rule That Matters
The only legal restriction on super PACs is that they cannot coordinate with candidates. The Federal Election Commission is supposed to enforce this. It does not.
- 0
- candidates or groups punished for illegal coordination in 15 years since Citizens United
- 2 of 6
- FEC commissioners in place (August 2026). Quorum requires 4. Agency cannot investigate or fine.
- 0 of 24+
- FEC investigations authorized into Trump-related campaign finance matters, despite 24+ staff recommendations
The FEC lost quorum on May 1, 2025 when Commissioner Allen Dickerson resigned. With only 2 of 6 commissioners, the agency cannot investigate complaints, levy fines, issue new rules, or open audits. It can still accept filings and answer questions. It cannot act on what it finds.
The shutdown has now run more than a year. President Trump nominated Ashley Stow and Andrew Woodson in February 2026, but the Senate has not confirmed them, so Shana Broussard and Dara Lindenbaum remain the only two commissioners.
The Brennan Center documented that in 14 years since Citizens United, the FEC initiated roughly 12 coordination investigations. None resulted in fines. The agency’s penalties in 2023 were the same dollar amount as in 2004, despite spending tripling.
The watchdog has no bite while spending records fall.
“Starting today, corporations with large war chests to deploy on electioneering may find democratically elected bodies becoming much more attuned to their interests. The opinions of real people may be marginalized.”
Justice John Paul Stevens, Citizens United dissent (2010)
Every Peer Democracy Caps Election Spending Except America
Campaign finance rules in peer democracies
| Country | Independent spending limits | Corporate political spending |
|---|---|---|
| United Kingdom | ~$39K per candidate per constituency | Permitted with limits |
| Canada | ~$0.74 per voter per district | Banned since 2006 |
| France | Caps + public reimbursement | Banned |
| Brazil | Mandatory limits | Banned since 2015 |
| United States | No limits on independent expenditures | Unlimited since 2010 |
A single American billionaire can spend more on one election than the entire campaign budget of a Canadian federal election.
State Reforms That Are Working
Federal reform has stalled. State-level reforms are proving that alternatives exist.
New York State’s public financing program halved big-money donations in its first cycle. Large donations (over $1,000) dropped from 70% to 38% of campaign funding. Small donations rose from 5% to 45%. The program matches small contributions 8-to-1, amplifying ordinary donors.
| Period | Value |
|---|---|
| Before public financing | 70% |
| 2024 (first cycle) | 38% |
| Change | Big money halved |
State campaign finance reforms since Citizens United
| State | What they did | Result |
|---|---|---|
| New York | 8-to-1 small donor matching, lower contribution limits | Big money halved. Small donors rose from 5% to 45%. |
| Arizona | Voters' Right to Know Act (Prop 211, 2022). Disclose donors above $5,000. | 70% voter approval. Law upheld by state Supreme Court. |
| Maine | Question 1 (2024). $5,000 cap on super PAC contributions. | 74% approval. Blocked by a district court in 2025; on appeal at the First Circuit. |
| Alaska | Ballot Measure 2 (2018). Open primaries + RCV + disclosure. | Small donations increased. |
| Minnesota | Democracy for the People Act (2023). Ban foreign-influenced corporate spending. | Passed state Senate. |
The constitutional amendment movement has reached half of all states. 25 state legislatures have passed resolutions calling for an amendment, with Idaho becoming the 25th in 2026. More than 840 local governments have done the same. 75% of Americans support a constitutional amendment, including 66% of Republicans and 85% of Democrats.
Not all political spending is corruption
Citizens United is a real problem. It is not the only problem, and not all spending it enabled is corrupt.
- Small donors still matter. Grassroots fundraising powered Obama (2008), Sanders (2016, 2020), and dozens of down-ballot campaigns. The problem is not that people spend money on politics. The problem is that a few hundred people spend more than everyone else combined.
- Nonprofits have free speech rights. The ACLU filed an amicus brief supporting the Citizens United ruling because it feared the alternative would let government regulate nonprofit speech. The ACLU did not endorse unlimited corporate spending, but it defended the principle that government should not decide which organizations can speak about politics.
- Disclosure is the core fix, not a spending ban. Most reform proposals focus on transparency, not prohibition. The DISCLOSE Act does not limit spending. It requires that voters know who is paying.
- The FEC failure is separate from the ruling. Citizens United did not disable the FEC. Commissioner vacancies, partisan deadlocks, and enforcement apathy did. A functioning FEC could enforce existing coordination rules without overturning the decision.
Frequently asked questions
Is Citizens United still in effect? Yes. The ruling has never been overturned. It remains the controlling precedent on corporate political spending. Only a constitutional amendment or a future Supreme Court reversal can change it.
Can Citizens United be overturned? Only through a constitutional amendment (requires 2/3 of Congress and 3/4 of states) or a future Supreme Court case. Congress cannot overturn a constitutional ruling by statute. 25 states have passed resolutions calling for an amendment. 75% of Americans support it.
What is the difference between a PAC and a super PAC? Traditional PACs can donate directly to candidates (up to $5,000) and can coordinate with campaigns. Super PACs can accept unlimited donations but cannot donate to candidates or coordinate. In practice, the FEC has never punished illegal coordination.
Does Citizens United allow foreign money in elections? No. Foreign spending remains illegal. But dark money loopholes make foreign contributions difficult to detect. Money can flow through shell companies and nonprofits without the original source being traceable.
How much has been spent since Citizens United? Super PACs spent $6.4 billion from 2010 to 2022. Outside spending hit a record $4.5 billion in 2024 alone, and about 2,500 super PACs raised $5.1 billion that cycle. Billionaire families spent $2.6 billion.
Why doesn’t the FEC stop illegal coordination? The FEC has 2 of 6 commissioners (August 2026), below the 4 needed for quorum. Even when it had quorum, partisan deadlocks prevented enforcement. The agency has punished zero coordination violations in 15 years.
What you can do
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Tell your senators to pass the DISCLOSE Act. The bill (S.3991) requires any group spending more than $10,000 on elections to identify donors above $10,000. It has been introduced every Congress since 2010. It has never passed. Use the letter and call script below.
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Support the constitutional amendment. 25 states have passed resolutions. Your state may be next. American Promise, Free Speech for People, and Common Cause organize amendment campaigns at the state level.
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Push for state-level reform. New York proved that public financing works. Arizona proved that disclosure laws can win 70% voter approval. Ask your state legislators what they are doing about campaign finance transparency.
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Follow the money in your own elections. OpenSecrets tracks federal spending. FollowTheMoney.org tracks state spending. When you see a political ad, look up who paid for it.