The $125 Million Primary: How Texas Became the Most Expensive Senate Race in History
More money has been spent on the Cornyn-Paxton runoff than most general elections. A forensic look at where it came from, where it went, and what it bought.
By the time polls close on Monday, May 26, the Republican Senate primary in Texas will have consumed more money than the entire 2020 Senate general election in Maine, the entire 2022 Senate race in Georgia, or the entire 2024 presidential primary combined. Over $125 million in advertising spending — and that’s just the ads, not the field operations, polling, consultants, travel, legal fees, and opposition research that don’t show up in AdImpact’s tracking.
This is not normal. This is not even abnormal. This is a category unto itself — the most expensive primary of any kind in American history, eclipsing the Georgia governor’s primary happening simultaneously ($100M+) and the Massie-Gallrein House primary in Kentucky ($32.6M) that set its own record on May 19.
Where the Money Came From
The spending breakdown reveals two very different campaign architectures:
Personal fundraising: $11.2 million raised through February, with decades of donor relationships across Texas corporate and legal circles.
Satellite spending: The Lone Star Freedom Project spent $18 million alone. Additional support from Senate Leadership Fund-aligned groups and Texas business PACs pushed total pro-Cornyn outside spending past $60 million.
Runoff ad ratio: Cornyn’s allies have outspent Paxton’s 4-to-1 in the runoff period alone.
Personal fundraising: $5.9 million raised through February — roughly half of Cornyn’s haul.
Grassroots + MAGA infrastructure: Paxton has relied on smaller-dollar donors, Trump-aligned PACs, and earned media from the endorsement battle. His cost-per-vote is dramatically lower than Cornyn’s.
The Trump multiplier: Trump’s May 19 endorsement is worth more than any ad buy. Earned media coverage of the endorsement has been valued at tens of millions in equivalent advertising.
The irony is stark: Cornyn has outspent Paxton at every stage of this race and is losing. He won the March primary by just 1.5 points despite a massive financial advantage. In the runoff, despite spending 4x as much on ads, he trails by 3 points in the most recent polling. Money, it turns out, cannot purchase loyalty in a party that has redefined loyalty around a single person.
What $125 Million Bought
Primarily, it bought damage. Both candidates enter the general election as diminished figures:
Cornyn has been branded a RINO by the leading Republican in the country. Even if he survives the runoff, his MAGA base will be demoralized. His warchest is depleted. His vulnerabilities — age, tenure, establishment associations — have been litigated on television for three months.
Paxton has had his securities fraud charges, his impeachment, his FBI investigation, and his divorce aired on television at saturation levels across every media market in Texas. Democratic oppo researchers didn’t have to lift a finger — Republicans did the work for them.
James Talarico, the 33-year-old Democratic nominee, has been running general election ads since March. His total spending is a fraction of either Republican’s. He has no primary wounds. He has no oppo research file that hasn’t already been built. He is, in the parlance of political operatives, “clean” — and his opponents have spent $125 million getting dirty.
“While the money may be on his side, the people are on our side. And in Texas, the people always win.”
The $125 million primary is a cautionary tale about what happens when a party spends more money fighting itself than fighting its opponents. Win or lose on Monday, Republicans in Texas will enter the general election broke, bruised, and facing a unified Democrat with the wind at his back. That’s what $125 million bought.