Who are the most vulnerable Senate Republicans in 2026?

There are 35 U.S. Senate seats up for election in 2026, with at least four battleground states expected to decide the balance of power – and whether Republicans maintain control of all three branches of government during the second half of President Donald Trump's term. 

In 2025, Republicans control the Senate 53-47, including two independent senators who caucus with the Democrats. Republican Sens. Thom Tillis, Susan Collins, Jon Husted, John Cornyn and Bill Cassidy could all face fierce fights to maintain their U.S. Senate seats next year. 

The Democratic Senatorial Campaign Committee (DSCC) announced in January that Sen. Kristen Gillibrand, D-N.Y., will chair the DSCC with Sens. Mark Kelly, Adam Schiff and Lisa Blunt Rochester as vice chairs during the 2026 election cycle. The DSCC has not yet announced their target races...