A comment by a Donald Trump supporter, who suggested the United States needed to "get rid" of Muslims, went unchallenged by the presidential candidate. The GOP front-runner also took flak for not correcting the man's assertion that President Barack Obama was not a U.S. citizen.

"We have a problem in this country. It's called Muslims," the unidentified man said at a question-and-answer town hall event on Thuesday in Rochester, New Hampshire, according to CNN.

"You know our current president is one. You know he's not even an American," the supporter added.

The man proceeded to allege that Muslims have "training camps growing where they want to kill us" and asked Trump when "we can get rid of them."

"We're going to be looking at a lot of different things," replied the tycoon turned White House hopeful. "You know, a lot of people are saying that, and a lot of people are saying that bad things are happening. We're going to be looking at that and many other things."

Trump then moved on to another audience member, the news channel detailed. The exchange, meanwhile, prompted almost immediate outrage from Democrats, along with demands for an apology, Agence France-Presse noted.

Trump's failure to denounce the "hateful rhetoric about Muslims is disturbing [and] just plain wrong," Democratic front-runner Hillary Clinton noted on social media. "Cut it out," she chided her GOP rival.

Vermont Sen. Bernie Sanders, Clinton's main challenger for the Democratic nomination, for his part, urged Trump to "apologize to the president and American people for continuing the lie that the president is not an American and not a Christian."

Keith Ellison, the first Muslim elected to Congress, meanwhile, called the incident a sign of "a lack of moral courage," according to CNN.

"I don't know if Trump is using dog-whistle politics to win support in the polls, or if he genuinely believes the racist things he says," Ellison charged. "Either way, he showed a complete lack of moral courage in that clip, and he has shown once again that he completely unqualified to be president of the United States."