President Barack Obama said Donald Trump was "the classic reality TV character" who had tapped into something real in the Republican Party but was unlikely to end up as president.
"He is a great publicity-seeker - and at a time when the Republican Party hasn't really figured out what it's for as opposed to what it's against," Obama said of Trump during an interview on CBS' "60 Minutes" program airing on Sunday night.
Opinion polls put Trump at the front of a crowded Republican field seeking the party's nomination for the November 2016 presidential election.
The billionaire real estate mogul and television personality has aroused controversy with his provocative remarks on illegal immigration. He has promised to build a wall on the US-Mexico border and to deport the estimated 11 million illegal immigrants already in the United States.
Obama said Trump had tapped into something that "exists in the Republican Party that's real. I think there is genuine anti-immigrant sentiment in the large portion of at least Republican primary voters."
"He is, you know, the classic reality TV character," the Democratic president said, adding it was not surprising Trump had received a lot of attention in the campaign's early stages.
Asked if he thought Trump would eventually disappear from the race, Obama replied: "I'll leave it up to the pundits to make that determination. I don't think he'll end up being president of the United States."