Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE on Saturday set his sights on Democratic presidential candidate Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE, both mocking him and calling for him to stay in the presidential race.

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“Crazy Bernie, he’s crazy as a bed bug, but, you know, he doesn’t quit,” Trump said during a rally at the Treasure Island Casino in Las Vegas.

Trump insinuated that Sanders is staying in the race in hopes that presumptive Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE is indicted over her use of a private email server as secretary of State.

“And I think Bernie should continue to go forward, folks,” the presumptive GOP presidential nominee said. “He should fight to the last end. Well, he’s waiting for the FBI to do what everybody thinks they’re going to do.

“I think he’s sort of saying, ‘Look, let’s hang in there, because ultimately it’s called the ‘FBI convention,’ and then we’ll be the only people and we’ll have done something like Trump did. I want to be like Trump,’ he said.

"If he gives up, we’ll say, 'Bernie, you’re a loser, you gave up.' "