Some took the comments as a call for violence against Clinton.
Donald Trump has come under fire after suggesting that "Second Amendment people" could "stop" Hillary Clinton.
His comments, made at a rally in Wilmington, North Carolina on Tuesday afternoon, come after the billionaire's repeated claims that Clinton wants to abolish the right to bear arms.
"Hillary wants to abolish, essentially abolish the Second Amendment," he said. "By the way, and if she gets to pick, if she gets to pick her judges, nothing you can do, folks. Although the Second Amendment people, maybe there is, I don't know."
Some saw the comments as a call for violence against the Democratic candidate.
Her vice presidential nominee, Tim Kaine, expressed his shock in a radio interview.
"There is absolutely no place, there should be no place in our politics for somebody who wants to be a leader to say something even in an offhand way that is connected to inciting violence," he said.
On Tuesday night, House Speaker Paul Ryan urged Trump to clarify the comments.
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"It sounds like just a joke gone bad. I hope he clears it up very quickly," he told a reporter. "You should never joke about something like that."
Appearing on Fox News later Tuesday, Trump told Sean Hannity that he had only called for Second Amendment supporters to take political action.
"There can be no other interpretation," he said. "I mean, give me a break."
Clinton’s campaign manager Robby Mook, released a statement Tuesday about Trump’s comments: "This is simple – what Trump is saying is dangerous. A person seeking to be the president of the United States should not suggest violence in any way.”
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