The curiously timed withdrawals of Pete Buttigieg and Sen. Amy Klobuchar, D-Minn., on the eve of Super Tuesday is a plot to rig the Democratic primary against Sen. Bernie Sanders, I-Vt., again, President Donald Trump told a campaign rally Monday night.

"It's sad," Trump told a packed and raucous campaign rally at the Bojangles Coliseum in Charlotte, North Carolina. "It's being rigged against Crazy Bernie. Crazy Bernie is going to go crazy."

Trump pounced on reports Buttigieg and Klobuchar are now stumping for Joe Biden and have reportedly been offered positions in his prospective administration.

"They made a deal," Trump shouted. "You know why? Quid pro quo! That's why.

"They made a deal. Impeach them. They should be impeached!"

Trump continued his attacks on the remaining challengers for the presidency, including Biden, who he called "Sleepy Joe" and ripped him for making mistakes in speeches and debates.

"I thought he gave up the presidency the other day because he said he's running for the Senate," Trump said. "I looked at the first lady and said, 'hey, he's running for the Senate.'

"And today he said 'Super Thursday.' He's looking forward to Super Thursday."

"He said Super Thursday, ugh, you can't do these things," Trump added later.

"Could you imagine if I said Super Thursday? It would be over."

"He makes a lot of those mistakes," he continued, ripping Biden. "It's a little scary."

Among them was a debate gaffe that went unchecked by moderators where Biden claimed guns killed 150 million Americans last year, which Trump noted, would be "50% of our population."

"That's a big story, man," Trump mocked. "We can't make even a little mistake.

"You can't do that when you're negotiating with China," he added. "You can't do that when you're negotiating with these countries. Those mistakes would be very expensive."

As for holding rallies on the eve of primaries, Trump mocked Sanders' objections to the Trump campaign "doing a little trolling."

"'Why would he be there?'" Trump mocked Sanders as asking.

"Why," Trump told the crowd, "because I want to win."