Megadonors have poured roughly $2 billion into the 2026 midterm elections through the most recent reporting period, according to analyses of Federal Election Commission data. The top 20 donors alone account for approximately that total, fueling what is on track to be the most expensive midterm cycle in history.

Republican-aligned donors dominate the list. Elon Musk, the world's richest man and CEO of Tesla and SpaceX, leads with contributions exceeding $445 million, all directed to groups supporting GOP candidates. His giving surpasses previous records for any single donor in a midterm race.

Other major Republican backers include packaging magnates Richard and Elizabeth Uihlein, who have given more than $140 million, and financier Jeff Yass, with over $100 million. Venture capitalists Marc Andreessen and Ben Horowitz have also contributed tens of millions to Republican causes. Together, these and similar donors have created a significant financial edge for Republicans.

Democratic megadonors have also substantially invested in the cycle. George Soros and his family have given around $100 million, while former New York Mayor Michael Bloomberg has contributed roughly $80 million. Reid Hoffman has added tens of millions more on the Democratic side.

The surge in megadonor activity reflects broader trends since the Citizens United decision. The top 40 donors this cycle have given more than $2.4 billion through mid-October, eight times the inflation-adjusted total from 2014. Much of the money flows through super PACs and dark-money groups, amplifying the influence of a small number of wealthy individuals.

With Election Day on November 3 just two days away, the funds are concentrated in competitive Senate and House races. Advertising spending projections exceed $11 billion for the full cycle, outpacing prior midterms and even the 2024 presidential contest.

Observers note that the partisan tilt among top donors has grown sharper compared to recent cycles, with Republican-aligned contributions outpacing Democratic ones by wide margins among the largest givers.