Kentucky U.S. Rep. Thomas Massie lost his Republican House primary Tuesday in another test of President Donald Trump’s power over his party after he handpicked challenger and ultimate winner Ed Gallrein to oust the incumbent.

Congressman Thomas Massie, one of the most vocal Republican critics of Donald Trump, has lost his fight for re-election to a challenger endorsed by the president. Ed Gallrein, a former Navy Seal, will now compete in November's midterm election after his victory in the Kentucky primary on Tuesday.

The president has tried to oust the Kentucky Republican for voting against his spending bills, opposing his wars and pushing to get the Epstein files released.

Republican Rep. Thomas Massie is bearing the brunt of the White House in his primary race for Kentucky's 4th Congressional District against Trump-backed Ed Gallrein. Massie spoke with CBS News' Ed O'Keefe a day before the election about the record-breaking spending in his race,

Rep. Thomas Massie previously said he has "no Fs to give" as he defied Trump on the Epstein Files and other issues

President Donald Trump’s quest to oust Rep. Thomas Massie from his U.S. House seat in Northern Kentucky has turned into the most expensive House primary in American history and a signature test of the unpopular second-term president’s grip on his party.

Rep. Thomas Massie, a constant thorn in the side of GOP leaders during his eight terms in Congress, is no stranger to a primary challenge. But this year, President Donald Trump’s fury with the Kentucky libertarian has reached a boiling point.

Thomas Massie in Kentucky’s GOP primary on Tuesday. It’s one of the final checkpoints in Trump’s monthlong effort to punish Republicans for bucking him. And the list of Massie’s sins is long, from his opposition to the president’s signature tax-and-spending plan to his forceful stands against the war in Iran and successfully pushing for the release of the Jeffrey Epstein files.