Montana Rep. Matt Rosendale announces Senate bid, complicating Republican effort to flip seat in 2024

GOP Rep. Matt Rosendale of Montana, a member of the hard right House Freedom Caucus, announced Friday he's running for Senate.

"Today, I'm asking for your support to run for the United States Senate," he said in a video posted on X.

Rosendale is the second Republican to jump into the race to unseat incumbent Democratic Sen. Jon Tester. He'll face off against Tim Sheehy, a veteran and wealthy businessman who announced his candidacy last June. Sheehy is backed by National Republican Senatorial Committee Chairman Steve Daines and Senate Minority Leader Mitch McConnell.