Tim Sheehy, a pro-Donald Trump conservative and ex-Navy SEAL, cruised to victory in Montanas Republican Senate primary on Tuesday, securing the nomination to take on three-term incumbent Democratic Sen. Jon Tester in November.

A newcomer to politics, Sheehy went into Tuesdays primary as the heavy favorite, with endorsements from Trump, Montana Gov. Greg Gianforte and several other high-profile Republicans. The GOP establishment rallied around the millionaire businessman because of his military background and his ability to self-finance his campaign. Sheehy has so far spent more than $2.1 million of his own money on his bid, according to campaign filings a number that is likely to grow dramatically over the next five months.

The Associated Press called the race Tuesday around 10:30 p.m. ET, with 25% of ballots counted, and Sheehy having secured 75% of the vote. He defeated his two primary opponents, Brad Johnson and Charles Walkingchild, by wide margins.

Tester also handily defeated his primary opponent, Michael Hummert, on Tuesday.