One Billion Dollars

The number

Control of the United States Senate comes down to about a dozen races. The money has already voted.

Outside groups — super PACs and nonprofits that are legally barred from coordinating with candidates, and free of every limit that binds the candidates themselves — spent more than $1 billion in the general election backing Republican Senate candidates across the 11 races the Cook Political Report rates as toss-ups or leaning one way, according to a Sludge analysis of Federal Election Commission data as of November 1. Groups backing Democrats — plus the backers of Nebraska’s independent — spent $687.2 million in the same races. That is the documented shape of this election: the candidates are the smaller war. The bigger one is being fought over their heads, by organizations most voters have never heard of, funded in amounts no candidate is allowed to raise.

PoliVion counted the same filings a second way — every general-election independent expenditure in every Senate race, from the FEC’s bulk Schedule E records — and the picture agrees. The ten Senate races that drew the most outside money absorbed $1.74 billion between them; across all Senate races, the general-election outside total is $1.91 billion.

Where the outside money landed

The ten Senate races with the most general-election outside spending — independent expenditures only, both sides combined, from FEC filings:

How to read the breakdown: “For” is spending to support a candidate and “Against” is spending to oppose one. Ads that did both at once are counted a single time, on the “same ads” lines. Candidates marked “AIPAC-backed” are those PoliVion’s hub tracks as AIPAC-funded. “Other candidates” is money spent for or against anyone else named in that race’s filings.

One committee’s name recurs down the right-hand column. That is the story inside the story.

The Republican machine

The Senate Leadership Fund — the super PAC aligned with Senate Republican leadership — is the largest outside spender in the Senate elections, and it is not close. In the general election alone, its independent expenditures in Senate races total $343.5 million in the FEC’s filings, counted by PoliVion — the biggest spender in Ohio, Michigan, Iowa, Maine, Kansas, Alaska and North Carolina. It also spends through recipient PACs with local names: Texas PAC, which put $181 million into the Texas race for Ken Paxton, and The Maine Standard, which spent $9.9 million in Maine.

Who funds it is a separate ledger, and the distinction matters: the fund’s two biggest backers did not buy ads — they wrote checks to the PAC. Elon Musk contributed $168 million to the Senate Leadership Fund this cycle, almost all of it in September, according to Sludge; One Nation, the fund’s dark-money affiliate — a nonprofit that does not disclose its own donors — contributed $133 million. Those are direct contributions to a super PAC, which may accept them without limit. The billion at the top of this article is what the machine spent; this is what it took in, and from whom.

The President’s own machine runs alongside it. MAGA Inc. and its spinoff No Going Back PAC spent $89.2 million in independent expenditures on Senate races, focused largely on Michigan, New Hampshire and Texas, per Sludge — raised, Sludge reports, from crypto firms and from tens of millions in tobacco and fossil-fuel money.

And the crypto industry’s own network crossed the aisle’s edge cases: Fairshake, financed by Coinbase, Ripple and Andreessen Horowitz, spent $56.6 million backing Jon Husted in Ohio and $13.5 million backing Pete Ricketts in Nebraska, through its affiliated super PACs — PoliVion’s count of the filings matches Sludge’s figures. In Nebraska, that money backs a Republican incumbent against an independent, Dan Osborn, in a race the national parties barely contest on the Democratic side at all.

The other side

The Democratic-aligned outside effort is smaller at the top line — $687.2 million across the same deciding races, per Sludge — and built around one main vehicle of its own: WinSenate, the Senate Majority PAC’s spending arm, whose general-election independent expenditures in Senate races total $280.7 million in the filings — the top outside spender in New Hampshire and the near-equal of the Senate Leadership Fund in Ohio ($87.4 million to its $95.4 million) and Michigan ($46.5 million to $47 million).

Where Democrats hold the advantage is the candidates’ own campaigns. OpenSecrets projects Democratic Senate candidates will outspend Republican ones roughly two-to-one — in Texas, James Talarico raised nearly $145 million for his own campaign against Paxton’s $22 million, which is precisely why the outside machine matters so much on the Republican side: it is the equalizer, and then some. Overall, OpenSecrets expects this midterm to cost a record $11.9 billion, with outside spending reaching $3.9 billion — up 85% from 2022.

What the money bought

Mostly, it bought the air itself. A Washington Post analysis of AdImpact data found outside groups had spent more than $1.2 billion on advertising in competitive congressional races by mid-October, and that outside groups account for more than half of all advertising in over 70% of competitive races. In Alaska’s Senate race, outside groups are 80% of all spending; in Maine’s, 79%. When four-fifths of everything a voter sees about a race comes from organizations that are not the candidates, the campaign a state experiences is the one the funds chose to run.

Michigan shows the full stack in one state: $246.7 million in general-election outside spending — the Senate Leadership Fund and WinSenate nearly tied at the top — on top of a primary in which AIPAC’s United Democracy Project spent $30.6 million trying to stop El-Sayed and lost, and a general-election fight run through the Great Lakes Conservatives Fund and the nine donors named in the Epstein files who helped fill it.

Our read

Sources: Sludge, “The Corporations and Billionaires Bankrolling the GOP’s Fight for the Senate,” Nov 3, 2026 (analysis of FEC data as of Nov 1, 2026: the $1 billion and $687.2 million figures for Cook Political Report’s 11 toss-up/lean Senate races; Senate Leadership Fund funders Elon Musk, $168 million in contributions, and One Nation, $133 million in contributions; MAGA Inc. and No Going Back PAC, $89.2 million in independent expenditures; Fairshake network, $56.6 million in Ohio and $13.5 million in Nebraska); FEC bulk Schedule E independent-expenditure records, 2026 cycle (PoliVion count: general-election Senate independent expenditures by race and by committee, filings received through Nov 3, 2026, dissemination through Oct 31, 2026 — Senate Leadership Fund $343,538,787; Texas PAC $180,974,066; WinSenate $280,711,024; The Maine Standard $9,910,757); Washington Post analysis of AdImpact data, Oct 15, 2026 (outside groups’ share of advertising in competitive congressional races; Alaska 80%, Maine 79%); OpenSecrets, “OpenSecrets predicts record $12 billion in midterm election spending,” Oct 30, 2026 ($11.9 billion projected total; $3.9 billion outside spending; candidate-spending projections; Talarico and Paxton campaign receipts); PoliVion, “The Great Lakes Fund, Unwrapped” (/the-continuation/) and “Epstein Money in the Michigan Election” (/epstein-money-in-the-michigan-election/) (Michigan figures and the UDP primary).