Democrats seized control of both houses of Congress in the 2026 midterms, a victory that defied the financial odds. They claimed seven seats previously considered Republican strongholds. The win came despite the GOP pouring significantly more capital into the race.
Money did not buy the outcome. OpenSecrets, the nonpartisan watchdog, labeled these the most expensive midterms in US history. Outside groups and independent committees dumped at least $2 billion into Senate races alone. This figure excludes direct candidate contributions.
The disparity was stark. Republicans spent 60% more than Democrats. In Texas, a key battleground, Elon Musk and other wealthy backers funneled $316 million to support Attorney General Ken Paxton. Paxton struggled to raise funds himself. Democratic groups, by contrast, deployed $109 million for James Talarico, who raised over $146 million directly. Talarico won.
Voter sentiment shifted on two specific fronts. First, opposition to data centers became a potent political force. In 10 states, voters backed measures restricting these facilities. Redbud Consulting tracked 40 out of 41 ballot measures that limited data center development. Stocks linked to AI and data infrastructure dropped in the days following the polls.
Second, a massive demographic pivot occurred. Janet Murguía, CEO of UnidosUS, reported a record 14.5 million Latino votes. This group moved decisively back toward the Democrats. In 64 majority-Latino counties with Senate races, Republican support fell by 14 percentage points compared to 2024. In Hidalgo County, Texas, that drop hit 25 points. The next step involves a Democrat-led Congress tightening oversight on tech and infrastructure projects.