He says his campaign underestimated the appeal of Obama's new health care law to low-income voters.
But he knows that because he lost the race, it's hard to tell the GOP to listen now to what he has to say about how to improve the party's message.
The Romneys are living in Southern California now and he's kept a low profile since the election. He says "you move on" from the disappointment and that "I don't spend my life looking back."
Ann Romney says that after the election she was approached by TV's "Dancing with the Stars," but declined to join the cast.
She says she'll be turning 64 soon and "I'm not really as flexible as I should be."
The interview was taped Thursday and aired Sunday.