Donald Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE early Sunday accused Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE of lying by saying the Vermont senator's "disrupters" aren't told to go to the GOP front-runner's events.

Trump also threatened in a tweet that his supporters would go to Sanders events if the Democratic hopeful wasn't "careful."

Bernie Sanders is lying when he says his disruptors aren't told to go to my events. Be careful Bernie, or my supporters will go to yours! — Donald J. Trump (@realDonaldTrump) March 13, 2016

Sanders said on Saturday his supporters are not to blame for violence that broke out at a planned Trump rally in Chicago.

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"I don't think our supporters are inciting. What our supporters are doing is responding to a candidate who has, in fact, in many ways, encouraged violence," Sanders said at a press conference, according to CNN. "When he talks about ... 'I wish we were in the old days when you could punch somebody in the head.' What do you think that says to his supporters?"

Trump was forced to cancel a rally on Friday night when massive demonstrations sparked scuffles between his supporters and protesters.

During a campaign stop on Saturday, Trump said his supporters "caused no problem."

"They were taunted; they were harassed by these other people — by the way, some represented Bernie, our communist friend," Trump said.

—This report was updated at 8:25 a.m.