told ABC's Christiane Amanpour that he could see himself supporting Donald Trump for president.

"Donald Trump, when I first saw that he was getting in, I thought, well, this has got to be a joke," Graham explained. "But the more you listen to him, the more you say to yourself, you know, maybe this guy's right."

"So, he might be your candidate of choice?" Amanpour asked.

"Sure, yes," Graham replied.

Trump has gotten a lot of attention in recent days for suggesting that President Barack Obama is not a natural born U.S. citizen.

Amanpour's full interview with Graham is set to air Sunday.