U.S. President Donald Trump is targeting Representative Thomas Massie in Tuesday’s Republican primary in Kentucky, backing a challenger to try to purge one of his loudest critics from within the party.

Republican voters in northern Kentucky are choosing between U.S. Rep. Thomas Massie and challenger Ed Gallrein in Tuesday's House primary

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,

Jeff Zeleny joins OutFront live in Kentucky where GOP Rep. Thomas Massie is fending off attacks from President Trump and Secretary Hegseth ahead of Tuesday’s primary.

Rep. Thomas Massie is facing Trump-backed retired Navy SEAL Ed Gallrein in Tuesday's primary for Kentucky's Fourth Congressional District. CBS News congressional reporter Taurean Small has the latest.

Massie said the president is worried about his preferred candidate Ed Gallrein's chances in the Kentucky race.

Is there a future in politics for Republicans who cross President Donald Trump? The signs this year suggest no, and Trump has convinced his voters to defeat his adversaries again and again. The next test of the president's power to extract retribution is on Tuesday,

The Kentucky 4th Congressional District primary pits U.S. Rep. Thomas Massie against Trump-backed Ed Gallrein.