Sen. Lindsey Graham (R-SC) had some tough words for the Republican Party on Thursday night — at one point declaring, "My party has gone batshit crazy."

Graham, who ran for president in 2015 and dropped out, focused a good chunk of his comedy routine at the Washington Press Club Foundation's annual dinner on Donald Trump. He stated that he's not happy with the state of the country or his party right now.

But he noted, while sarcastically donning Trump's "Make America great again" hat:

Here's my contribution to the country: I ran for president, and I had to get out. I endorsed Jeb Bush, and he had to get out. I'm the Dr. Kevorkian of the Republican primary. Tonight, I endorse Donald Trump.

Graham also took aim at Ted Cruz, a candidate who notoriously lacks friends in the Senate that both he and Graham serve in. "If you kill Ted Cruz on the floor of the Senate, and the trial was on the Senate, nobody could convict you," Graham said.

He also took shots at several of the other candidates. "The nice guy is Ben Carson," Graham said. "He tried to kill his cousin."

Mostly, it was all in good fun for Graham. Except the Cruz and Trump parts — Graham really, really doesn't like either of them.

Watch: Donald Trump's rise is a scary moment in America