Who is spending the most in US Senate races? And who is paying for it? Top candidates, biggest donors, and where the cheques come from?

As the United States braces for congressional elections on November 3, the money game in the Senate race is making the news. But who has the financial edge? Republicans, with their huge influx of cash, are reportedly outplaying Democrats on advertising, whereas Democrats hold an edge on fundraising in the Senate's most competitive races.

How much money is in each Senate race?

According to Federal Election Commission data, US Senate candidates have collectively raised $1.27 billion; meanwhile, total spending has reached 1.09 billion so far. Texas leads in outside spending with a combined total of roughly $460 million, followed by Ohio, Michigan, Maine, Iowa, and North Carolina.

Here's the list of Outside spending as of October 16, 2026.

Which outside groups spend the most?

According to OpenSecrets, the Senate Leadership Fund has spent $358.7 million, the most of any outside group.

Overall, $2.51 billion from outside group spending consists of $1.33 billion by conservatives, $ 880 million by liberals, and $ 302.60 million by others.

Top 10 outside-spending groups:

• Senate Leadership Fund (Super PAC)Conservative: $358.7 million
• MAGA Inc (Hybrid PAC) Conservative: $202.5 million
• Senate Majority PAC (Super PAC)Liberal: $150.3 million
• Fairshake PAC (Super PAC)Other: $135.7 million
• Congressional Leadership Fund (Hybrid PAC) Conservative: $102.9 million
• Americans for Prosperity Action(Hybrid PAC)Conservative:$87.2 million
• House Majority PAC(Hybrid PAC) Liberal: $75.1 million
• United Democracy Project(Super PAC) Other: $69.6 million
• American Bridge 21st Century(Hybrid PAC) Liberal: $52.3 million
• America PAC (Texas)(Super PAC) Conservative: $51.4 million

(Source: Open Secrets, as of October 16, 2026 data)

The X-factor

Since January 2025, Elon Musk, the world's richest man, has given over $365 million. At least $276 million since July for the 2026 midterm elections in favor of Republicans, as reported by Axios.

Republican Senate candidate from Texas, Ken Paxton, received $158 million from Musk in September alone.

Reportedly, Elon Musk's financial push reignited Ken Paxton's stumbling campaign. Texas headwinds were blowing towards Democrat James Talarico in late August. Elon Musk’s strong support came after the Grand Old Party’s (GOP) Senate leadership fund hinted at Paxton losing the polls. In a very short span, Republicans gathered $20 million to put Paxton on TV, who was earlier being portrayed as the 'most corrupt politician' in America.

Elon Musk’s contribution to the Senate Leadership Fund stood at $158 million in September, which accounted for nearly 58% of the $273 million SLF fund.

Axios cites a NYT report that Musk has given $276 million to 'pro-GOP midterm efforts' since July.

SLF’s warning against the financial burden of fielding Paxton over Senator John Cornyn arrived months ago. In 2025, SLF suggested endorsing Ken Paxton would cost around $200 million, which was far more than Cornyn's campaign cost (Senator John Cornyn is an incumbent and has served Texas since 2002). Donald Trump’s endorsement helped Paxton win the GOP primary.

Other big donors include:

• Jeff Yass, Susquehanna International Group
• Miriam Adelson, Adelson Clinic
• Richard Uihlein, Uline Inc.
• Paul Singer, Elliott Management

Top Spenders

(2026 election cycle by candidates' own campaign committees-duration 01/01/2021 to 12/31/2026)

• Texas Senator Democrat James Talarico: $114.2 million
• Georgia Senator Democrat Jon Ossoff: $109.2 million
• Ohio Senator Democrat Sherrod Brown: $56.8 million
• Michigan Senator Abdul El-Sayed: $41.4 million
• North Carolina Senator Roy Cooper: $34.7 million

(Source: Federal Election Commission)

AdImpact, an advertising intelligence and analytics company, revises its projections from $10.8 billion to $11.6 billion for the 2025-2026 election cycle.

Calling the Texas Senate race ‘The most expensive on record,’ AdImpact has increased its projections to $446 million in June this year, up 260% from its original projections of $124 million.

AdImpact writes, “On November 3rd, the 2026 midterm cycle is off to a record pace. Through June 1, AdImpact has tracked $4.0B in political advertising spend, surpassing the $2.7B recorded through the same point in the 2024 cycle and the $2.7B tracked through the same point in the 2022 cycle. This represents a 46% increase over the 2024 cycle."

Gubernatorial race spends

AdImpact has also revised its spending projections for the nationwide gubernatorial race to $2.4 billion from $1.9 billion, up 25% from the original estimate.

“The California gubernatorial race, the Texas Senate race, the Georgia gubernatorial race, the Virginia redistricting battle, and the Kentucky Senate race have already generated $785M through June 1."