Kentucky GOP Rep. Thomas Massie is defiant in the face of attacks from President Trump, who called him the worst congressman in history," heading into Tuesday's primary against Trump-backed former Navy SEAL Ed Gallrein.

Rep. Andy Barr, riding an endorsement from President Donald Trump, has won the Republican primary in the race for retiring Sen.

The president ousted the Kentucky congressman, as voters went to the polls in primaries in six states including Georgia and Pennsylvania.

In a major victory for President Trump, his hand-picked challenger, Ed Gallrein, beat out U.S. House Rep. Thomas Massie in a Kentucky House GOP primary, ending Massie's reelection bid.

State Sen. Mayes Middleton says Rep. Chip Roy betrayed the MAGA movement, while Roy says Middleton isn't qualified to work at the attorney general’s office, let alone lead it.

Dozens of candidates are running for Congress in Kentucky. Here's a look at primary election results in the state's six districts.

NBC News projects Drazan, a state senator, emerged from a 14-candidate field to advance to the general election in the blue state.

President Donald Trump on Tuesday endorsed  Ken Paxton in the GOP primary for U.S. Senate, supercharging his effort to oust incumbent Sen. John Cornyn in next week’s runoff. “Ken is a true MAGA Warrior who has ALWAYS delivered for Texas,