MSNBC host Rev. Al Sharpton had a combative exchange with a heckler on Monday, calling the unidentified man an "agent" of President Trump.

Sharpton was en route to Baltimore when he was slammed by Trump as a "conman" and "troublemaker." The Baptist minister and National Action Network founder responded by referring to the president a "racism peddler" on MSNBC and claiming he likes to "make trouble for bigots."

During his press conference, Sharpton continued his attacks on the president while defending Rep. Elijah Cummings, D-Md, calling Trump's tweets "bigotted and racist."

"He attacks everybody. I know Donald Trump. He's not mature enough to take criticism and he can't help it," Sharpton said. "He's like a child, somebody says something, he reacts. He's thin-skinned and not really matured that well, but he has a particular venom for blacks and people of color."

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However, while giving his remarks, a heckler chimed in, referring to Sharpton as a "phony."

"That's right, thank you Mr. Trump's agent," Sharpton reacted. "We were told there's a group of Trump folks that we know who they are, they were supposed to be here."

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It is unclear what the heckler said to Sharpton.

Sharpton has been defended by several 2020 Democratic candidates, including former Vice President Joe Biden, Sen. Elizabeth Warren, D-Mass., and Sen. Kamala Harris, D-Calif.