Republican presidential candidate Mitt Romney's son Tagg has apologized to President Barack Obama for saying in a radio interview that he was tempted to "take a swing" at the president for criticizing his father during a debate.

Tagg Romney on Monday walked up on stage with other family members after the third presidential debate, where cameras showed him shaking hands and exchanging words with Obama. After the second presidential debate, Tagg told a radio interviewer it made him angry when Obama questioned his father's honesty.

Tagg Romney said, quote, "You want to rush down to the debate stage and take a swing at him."

A Romney campaign official confirmed Tuesday that Tagg apologized for the remark. The official was not authorized to discuss personal matters and thus demanded anonymity.