Comedy and controversy collide on the campaign trail

Comedy and controversy collided on the campaign trail this weekend. The Donald became a "not ready for primetime player" and Republican rival Ben Carson is trying to put discrepancies about his past behind him.

Republican presidential frontrunner Donald Trump took center stage on "SNL" to applause but got back to issues while talking to ABC's George Stephanopolous Sunday.

He also took on his chief rival, Dr. Ben Carson, and allegations that stories about Carson's past don't add up.