The incident occurred outside the venue where the president was addressing a rally in Cincinnati, Ohio.
"We will be ending the AIDS epidemic shortly in America, and curing childhood cancer very shortly," Trump told supporters at a Cincinnati rally.
Maryland congressman Elijah Cummings compared the "send her back" chants at a recent rally for President Donald Trump to the civil rights desegregation era of the 1960s, declaring the president a "racist" after years of giving him the benefit of the doubt.
The comedian mocked the president's attempt to "officially re-launch the campaign he has never stopped."
"I think Hillary Clinton made a big mistake with that speech," Trump said about a 2016 speech made by Clinton.
Sunday's Fox & Friends mocked low attendance at several Trump impeachment rallies over the weekend, with the president himself giving the hosts several shout-outs on Father's Day.
Jewish leaders have warned their community to stay away from the demonstrations.
"How do you go bad on people who've carried you like a newborn for months?" a bemused Cuomo asked.
"How the heck did Donald Trump become president in 2016?" Yang said at his rally in New York City.
"You've probably heard this: There's an Asian man running for president, and he wants to give everyone $1,000 a month," Yang has said at recent rallies.
"Enough's enough, man," Biden said at a rally in Iowa. "This is nonsense."
"Tell your dad that TruNews loves your dad," a TruNews correspondent told Trump Jr.
Trump told his base in Michigan he had "much more beautiful everything" than the so-called "elite."
Representative Alexandria Ocasio-Cortez said she has been targeted by "a whole cable news channel and a dark-money internet operation."
During a fiery rally in Michigan on Thursday, President Donald Trump renewed his attack on the House Intelligence Committee Chairman Adam Schiff, resorting to mocking Schiff's appearance.
"Will be talking about the many exciting things that are happening to our Country, but also the car companies, & others, that are pouring back into Michigan, Ohio, Pennsylvania, North & South Carolina & all over!" Trump wrote about the rally on Twitter.
Hundreds of supporters of President Donald Trump celebrated "happy no collusion day" outside of New York City's Trump Tower Saturday, one day after Special Counsel Robert Mueller concluded his 2016 Russia investigation.
Iowa City is the second of Sanders's three-stop tour in a state that will be crucial to securing the 2020 Democratic nomination.
Trump Jr. hashtagged criticism of himself over O'Rourke as "#unhinged."
Donald Trump, the first president in more than a century not to have an official White House pet, took a shot at dog owners at a Monday rally, saying it'd feel "phony" for him to have a canine.
"We will meet lies and hate with the truth," the former Democratic congressman tweeted ahead of the rally.
"Big speech on Border Security and much else tonight," Trump tweeted.
While the senator talked to attendees outside a roundtable campaign event, a man came, rolled out a Trump banner and began yelling.