Money is a central part of American politics. Candidates for Congress and the presidency need huge sums to pay for ads, staff, travel, and polling. But the rules about where that money comes from, how much can be given, and who has to know about it are complicated and have changed a lot over time.
Here is the short answer up front:
- Individual donations to candidates are strictly limited. For the 2026 elections, one person can give a candidate $3,500 per election [2, 3].
- Outside groups called Super PACs can raise and spend unlimited amounts, as long as they do not coordinate directly with the candidate [3, 8].
- Corporations and unions cannot give money directly to candidates, but they can spend unlimited amounts through Super PACs and other outside groups [3, 6].
- The 2026 midterm elections are projected to cost nearly $12 billion, making them the most expensive midterms in US history [4, 7].
- A growing share of this money comes from “dark money” groups that are not legally required to reveal their donors [7].
The full explanation
The basic rule: limits on direct donations
The foundation of US campaign finance law is the Federal Election Campaign Act (FECA), first passed in 1971 and amended several times in the 1970s [3]. The law sets limits on how much an individual or group can give directly to a candidate.
These limits are adjusted for inflation every two years. For the 2025-2026 election cycle, an individual can give a candidate $3,500 per election [2, 3]. A primary and a general election count as separate elections, so the same person can give $3,500 in the primary and another $3,500 in the general election.
The rules also limit how much a person can give to political parties and political action committees (PACs). A PAC is a group that pools money from members and donates it to candidates. Traditional PACs have strict limits on what they can accept and give [3].
The Super PAC loophole
Everything changed with the Supreme Court’s 2010 ruling in Citizens United v. Federal Election Commission. The Court said that corporations, unions, and other groups have a First Amendment right to spend unlimited money on elections, as long as they do it independently of the candidate [5].
This created the Super PAC. A Super PAC is a type of committee that can accept unlimited donations from individuals, corporations, and unions. It can spend unlimited amounts to support or oppose candidates. The only rule is that it cannot coordinate its spending with the candidate’s campaign [3, 8].
The practical effect is huge. A wealthy donor who has already given the maximum $3,500 directly to a candidate can turn around and give millions to a Super PAC that supports that same candidate. The candidate cannot ask for the money, but everyone knows how the system works.
How much is being spent
The 2026 midterm elections are on track to cost about $12 billion, according to OpenSecrets, a nonpartisan group that tracks campaign finance data [7]. This would be the most expensive midterm cycle in US history, surpassing 2022 by nearly 30% [7].
Democrats have a clear edge in direct candidate fundraising. Democratic congressional candidates raised over $906 million by mid-October, compared to about $420 million for Republicans [6]. In the Senate races, Democratic candidates outspent Republicans by roughly two to one [6].
But Republicans have a large advantage in outside money. Republican-aligned Super PACs spent about $1.7 billion, compared to roughly $832 million for Democratic-aligned groups [7]. Billionaire Elon Musk alone spent over $445 million in the 2026 cycle, mostly through his own Super PAC and other Republican groups [4].
Where the money goes
Most of the money is spent on advertising. AdImpact, a tracking firm, projected that political ad spending for the 2026 cycle would exceed $11.6 billion [7]. Television still takes the largest share, at about 48%, but digital advertising on platforms like Facebook, Google, and YouTube is growing fast [7].
The spending is not spread evenly across the country. It concentrates on a handful of competitive races that will decide which party controls Congress. The Texas Senate race alone saw over $573 million in spending, making it the most expensive non-presidential race in US history [7].
The dark money problem
Not all money in politics can be traced. A category called “dark money” flows through nonprofit groups that are not required to disclose their donors. These groups can then give money to Super PACs or spend it directly on ads [7].
In the 2026 cycle, dark money groups made up an unprecedented 29% of the top 40 donors, with about $699 million that cannot be traced back to its original source [7]. This means voters often have no way of knowing who is really paying for the political ads they see.
Critics say this undermines the transparency that campaign finance law is supposed to provide. Supporters of the current system say that donor privacy protects people from harassment and that disclosure rules can be burdensome [3].
Myths vs facts
| Claim | Status | What the evidence shows |
|---|---|---|
| Corporations can give money directly to candidates. | Myth | Corporate and union contributions to candidates are banned. They can only spend through Super PACs and outside groups [1, 3]. |
| There is no limit on how much an individual can give to a candidate. | Myth | Individuals are limited to $3,500 per election to a candidate for the 2026 cycle [2]. |
| Super PACs can give money directly to candidates. | Myth | Super PACs cannot contribute to candidates. They can only spend independently to support or oppose them [1, 3]. |
| The 2026 midterms are the most expensive US election ever. | True | At nearly $12 billion, they surpass all previous midterms and even the 2024 presidential election [4, 7]. |
| All political spending must be publicly disclosed. | Myth | Dark money groups can spend on elections without revealing their donors [7]. |
What this means for readers outside the US
American elections are unusually expensive by global standards. The 2026 midterms alone will cost more than the entire annual budgets of many countries. This reflects a political system where spending is treated as a form of protected speech and where limits on money are viewed with deep suspicion by the courts [5].
For countries in Africa, Asia, and elsewhere, the US experience offers a cautionary tale. It shows how well-intentioned transparency rules can be eroded by legal rulings and loopholes. It also shows how a small number of extremely wealthy individuals can shape the political debate in a country of over 330 million people.
At the same time, the US system does have some strengths. Contribution limits for direct donations prevent the most obvious forms of corruption. Disclosure rules, where they are enforced, allow journalists and watchdogs to track where money comes from [1]. The debate is not about whether money should be in politics, but about how much and how visible it should be.
Bottom line
Campaign finance in the US is a system of strict limits on direct donations and almost no limits on outside spending. Individuals can give candidates only a few thousand dollars, but they can give Super PACs unlimited amounts. Corporations and unions are banned from giving to candidates but can spend freely through outside groups. The result is a political landscape where a handful of billionaires and dark money networks can shape elections, while the candidates themselves are constrained by rules that many voters do not fully understand. The 2026 midterms, at nearly $12 billion, show that the money is not going away. The question is who is allowed to give it and whether the public will ever know.
Disclaimer: This article is for general education only and does not replace professional advice relevant to the topic. If you notice an error or would like to send feedback or corrections, please contact us.
References
[1] Understanding ways to support federal candidates
[2] Contribution limits for 2025-2026
[3] The State of Campaign Finance Policy: Recent Developments and Issues for Congress
[4] Elon Musk spent $445 million on Republicans. It wasn’t enough
[5] Campaign Cash Before & After Citizens United
[6] Democrats Dominate on Campaign Cash This Year
[7] 119亿美元砸进美国史上最贵中期选举，钱从哪来？花到哪去？买到了什么？
[8] Statistical Summary of Six-Month Campaign Activity of the 2025-2026 Election Cycle
