Kentucky's U.S. Rep. Thomas Massie said attacks from fellow Republican President Donald Trump show he's worried about congressional opposition.

President Donald Trump and his political operation are working to unseat their first Republican incumbent: Kentucky Rep. Thomas Massie, who has drawn Trump's wrath by saying the president lacked the authority to attack Iran's nuclear sites without congressional approval and voted against his massive tax and spending cuts

President Trump again raked libertarian-leaning Rep. Thomas Massie over the coals Tuesday, taunting his fellow Republican as a “loser” who “votes ‘NO!’ on everything” after the Kentuckian expressed openness to pulling legislation that would rein in the president’s war powers.