Ben Carson said Monday that it's possible the violence at rallies held by Republican presidential front-runner 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 could get worse.

"I think certainly if the protesters continue with their ... tactics, there is a real possibility of escalation," Carson said on NBC's "Today" show.

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The former presidential candidate, who endorsed Trump last Friday, said supporters at Trump's rallies have two choices: They can do what the protesters want them to do, or they can fight back.

"And if they decide to fight back, there could be an escalation," he said.

The violence at rallies is a good opportunity for Trump to stand up and start talking about First Amendment rights and why they are so "important as part of the foundation of this country," Carson said.

"The problem is that there are those who are being taught that if someone disagrees with you, you have a right to interfere with their First Amendment rights, their ability to express themselves, their freedom of speech," he said.

"That's where the emphasis needs to be."

Carson also said Monday morning he thinks Trump will pivot "more in the direction of everybody, rather than just those who are angry."

"I think that's something that will be demonstrated very clearly, very shortly, and it's something again that all the candidates need to be talking about," Carson said on MSNBC's "Morning Joe."

"We have responsibility in this nation to help heal this nation."