- Individuals can give $3,300 per candidate per election (2024 limit); PACs can receive unlimited corporate and union funds but must disclose; Super PACs can spend unlimited amounts independently
- Total 2024 election spending exceeded $16 billion — the most expensive in US history; outside spending by Super PACs and dark money groups accounted for ~$5 billion
- Citizens United (2010) and McCutcheon (2014) eliminated aggregate contribution limits and opened the door to unlimited independent expenditures, fundamentally reshaping the system
- FEC disclosure requirements have large loopholes — 501(c)(4) "dark money" groups can spend on elections without ever revealing their donors
The Layers of Campaign Money
Campaign finance in 2026 operates through a multi-layered system of entities with different rules, limits, and disclosure requirements. Understanding the difference between these structures explains why the system is so difficult to reform and why unlimited money now flows through it.
Candidate committees: The official campaign committee (e.g., "Johnson for Senate") can only accept limited contributions — $3,500 per individual per election in 2025-26. All donations must be disclosed to the FEC. This is the most tightly regulated layer.
Traditional PACs: Political action committees can accept donations from individuals (up to $5,000/year), corporations, and unions, and can contribute directly to candidates (up to $5,000/election). All contributions and expenditures are disclosed. Most corporate PACs, union PACs, and trade association PACs operate under these rules.
Super PACs: Independent expenditure-only committees can raise unlimited amounts but cannot coordinate with candidates or contribute to them directly. They run independent ads, mailers, and voter contact programs. Because of the non-coordination requirement, super PACs technically cannot take direction from campaigns — but the rule is widely criticized as effectively meaningless, since many super PACs are run by former campaign staffers.
Dark money (501(c)(4)s): Social welfare nonprofits are not required to disclose their donors, even if they spend money on political advertising. As long as political activity is not their "primary purpose," these groups operate with minimal disclosure. Billions flow through this channel, making it impossible to trace the ultimate source of a substantial portion of political advertising.
Key Legal Milestones in Campaign Finance
| Year / Case | What It Did | Result |
|---|---|---|
| 1974 — FECA reforms | Post-Watergate; established contribution limits and FEC | First comprehensive campaign finance framework |
| 1976 — Buckley v. Valeo | SCOTUS: spending limits = free speech; limits on donations OK | Individual spending caps struck down; candidate self-funding unlimited |
| 2002 — McCain-Feingold | Banned "soft money" to parties; restricted issue ads near elections | Temporarily reduced outside money; subsequent court decisions gutted key provisions |
| 2010 — Citizens United | SCOTUS 5-4: corporations have free speech; can't limit independent spending | Opens floodgates for corporate and union independent expenditures |
| 2010 — SpeechNow.org | DC Circuit: groups making only independent expenditures can take unlimited donations | Creates the super PAC as a legal entity; independent spending explodes |
2026: The Money Landscape
Democrats have built a massive small-dollar donor infrastructure through ActBlue, the online fundraising platform. In 2022, Democrats raised significantly more in small donations (under $200) than Republicans. Anger at the Trump administration is expected to fuel another small-donor surge in 2026, potentially breaking records for individual donor participation in a midterm election.
Republican-aligned dark money groups have historically outspent Democratic-aligned groups, particularly through networks of 501(c)(4) organizations. The Koch network, US Chamber of Commerce, and allied groups have created a sophisticated infrastructure for undisclosed political spending. Democrats have built their own dark money operations but have historically trailed in this category.
Money in US elections is highly concentrated in competitive races. A Senate majority in a swing state can attract $200-400M in total spending, while safe-seat races draw little. The 2026 competitive map — a handful of toss-up Senate seats and roughly 30-40 competitive House districts — will determine where billions in outside spending flows over the next 18 months.
Frequently Asked Questions
What is the difference between a PAC and a super PAC?
A traditional PAC faces contribution limits (up to $5,000 per donor per year) and can contribute directly to candidates. A super PAC can raise unlimited amounts but cannot donate to or coordinate with candidates — it can only spend independently. Super PACs must disclose their donors to the FEC, but they can accept donations from dark money groups whose donors are not disclosed, creating a disclosure gap.
Can foreign nationals donate to US campaigns?
No — foreign nationals, including foreign corporations, are prohibited from contributing to or spending in US elections. However, enforcement is imperfect: shell companies and dark money structures can obscure the ultimate source of funds. The FEC has limited investigative resources, and prosecution requires proving knowing and willful violation of the law.
Does money win elections?
Money matters but is not determinative. In open competitive races, the well-funded candidate has a significant advantage in reaching voters. But in wave elections, even well-funded candidates in the wrong party lose. The evidence suggests money has diminishing returns — the first $5M in a Senate race has more impact than the $50M in spending that follows. However, falling below a spending threshold can be disqualifying in competitive races.
