obama_lightsPresident Barack Obama says most Americans are confident that he is American-born and bred and says the “birther” issue could be a problem for Republican challengers in the 2012 presidential campaign.

Obama addressed the persistent questions about his place of birth when he was invited, during an ABC News interview, to size up his potential opponents.

He was also asked his thoughts on Donald Trump’s rise to the top of the Republican field on “fantasies” about the president’s background.

Obama seemed amused.

“Over the past two-and-a-half years there’s been an effort to go at me in a way that is politically expedient in the short-term for Republicans — but creates, I think, a problem for them when they want to actually run in a general election where most people feel pretty confident the president was born where he says he was, in Hawaii,” Obama said.

“He doesn’t have horns,” he added, laughing.

Obama said people may disagree with him on some issues and worry about the unemployment rate and gas prices but they are “not really worrying about conspiracy theories or — or birth certificates.”