President Donald Trump reserved his fiercest attacks for Massie, a quirky conservative who had become among the most powerful rank-and-file Republicans in the House because of his willingness to vote as he pleased, rather than as the party demanded.

Rep. Ro Khanna (D-Calif.) suggested Tuesday that Rep. Thomas Massie’s (R-Ky.) defeat in Kentucky’s Republican primary was connected to his pressure on the Trump administration over its handling of the probe into convicted sex offender Jeffrey Epstein.  “My good friend Thomas Massie lost tonight,” Khanna said in a video posted on social media on Tuesday...