It must irk Republicans to no end that Donald Trump can literally crush them if they go against him. Trey Gowdy's endorsement of Rubio virtually guarantees his stock will plummet still further.

Source: Business Insider

Real-estate mogul Donald Trump repeatedly blasted Rep. Trey Gowdy (R-South Carolina) on Sunday after reports emerged that the influential congressman is set to endorse Sen. Marco Rubio (R-Florida) for president.

Trump, the Republican front-runner, pointed to Gowdy's high-profile October hearing on the 2012 attack in Benghazi, Libya, that left four Americans dead.

"His hearings were a disaster. Everybody was looking forward to something that was going to be really productive. And he didn't win with those hearings. It was a total not-good for Republicans and for the country," Trump said Sunday morning on "Fox & Friends."

Trump also retweeted a series of unkind tweets about the slimy Gowdy:

"@Sir_Max: andreajmarkley: Rubio finally gets an endorsement – from #Benghazi loser Gowdy #Tcot #pjnet https://t.co/lJcHG0IHaM via dailyne

— Donald J. Trump (@realDonaldTrump) December 27, 2015

"@mitchellvii: Face it, Trey Gowdy failed miserably on Benghazi. He allowed it to drag out and in the end, let Hillary get away with murder.

— Donald J. Trump (@realDonaldTrump) December 27, 2015

"@mitchellvii: My prediction on the Trey Gowdy endorsement of Rubio is that it will do nothing for Rubio and finish Gowdy."

— Donald J. Trump (@realDonaldTrump) December 27, 2015