Tim Sheehy, a wealthy Republican businessman, was dogged by controversies during the campaign. But Senator Jon Tester, a Democrat, could not outrun the demographic shift in his deep-red state.

NBC News projects Tim Sheehy has won the seat held by Jon Tester, a three-term Democratic incumbent, in a state that has shifted in Republicans’ direction in recent years.

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.