Audience Member: We have a problem in this country, it's called Muslims. Our current President is one. We know he's not even an American. We have training camps growing where they want to kill us. That's my question, when can we get rid of them?
Donald Trump: We're going to be looking at a lot of different things. A lot of people are saying that and a lot of people are saying that bad things are happening out there. We're going to be looking at that and a lot of different things.

At a town hall meeting in New Hampshire — as quoted in Maya Rhodan (17 September 2015), "Here's How Donald Trump Responded to a Person Saying President Obama is Muslim", Time

Donald Trump: Supporter at Rally Says Obama is Muslim