Former Navy SEAL Tim Sheehy has beaten three-term Democrat Senator Jon Tester in the Montana Senate race, flipping a key race as Republicans are set to take back control of the Senate, the Associated Press projects.

Republican Tim Sheehy will defeat three-term Montana Sen. Jon Tester, CNN projects, boosting the GOP’s hopes of claiming the Senate majority.

Sheehy, whose story about obtaining a bullet wound in Afghanistan has been subject to questions, won Montana’s Senate seat