The 2026 United States midterm election campaign is on track to become the most expensive in the nation’s history, with total spending projected to reach nearly $12 billion, according to campaign finance monitoring organization Opensecrets. A massive share of this financial backing is being propelled by outside political groups, particularly super political action committees, which are deploying vast resources into pivotal electoral contests ahead of the November 3 election.
Federal Election Commission filings covering expenditures up to mid-October show that more than $9.5 billion had already been spent during the current cycle. PACs and super PACs account for more than half of that total, contributing approximately $5.5 billion after seeing their spending nearly double over the preceding couple of months. While direct contributions to candidates remain restricted by federal regulations, super PACs can accept unlimited donations from individuals, corporations, and labor unions to independently support or oppose candidates.
Opensecrets projects that final expenditures could hit $11.9 billion, representing a roughly 30% increase over the 2022 midterm elections. Research from the liberal-leaning Brennan Center for Justice indicates that the 40 largest individual donors alone contributed a combined $2.4 billion by October 14, setting a new benchmark for this stage of a midterm cycle.
Billionaire entrepreneur Elon Musk leads individual contributors, having donated nearly $500 million to support Republican candidates as of October. Much of his funding has gone toward America PAC—a super PAC he established in 2024—and the Republican-aligned Senate Leadership Fund, with a strong focus on Texas, where several of his corporate entities are headquartered. America PAC has poured more than $45 million into the Texas Senate contest between Republican candidate Ken Paxton and Democrat James Talarico, while also allocating about $10 million each to competitive Senate races in Michigan and Ohio.
Other major donors have heavily backed Democratic causes. Organizations established by billionaire financier George Soros, including Geosor Corp and the Fund for Policy Reform, have jointly donated $102 million to liberal groups, while former New York City mayor Michael has contributed over $60 million to Democratic efforts. On the Republican side, trading firm executive Jeff Yass alongside business supply company owners Richard and Elizabeth Uihlein have collectively supplied more than $100 million to conservative causes, according to FEC records.
The cryptocurrency sector has also established a prominent financial footprint. According to Opensecrets analyst Brendan J. Glavin, digital asset firms Ripple and Coinbase have together funneled $63 million into super PACs aimed at advancing industry interests.
Campaigns and outside organizations deploy these funds across grassroots voter outreach, internal opinion polling, and event organization, but advertising commands the largest portion of expenditures. Tracking data from AdImpact shows that $11.15 billion had been spent on political advertising by the end of October. Campaign finance expert Michael Beckel noted that traditional broadcast television retains the lion’s share of ad spending, though investments in digital platforms continue to expand.
Geographically, AdImpact tracking reveals that the heaviest advertising investments are concentrated in Senate contests in Michigan, Texas, and Ohio, followed closely by Iowa and Maine.
