Mitt Romney on Sunday accepted an apology from MSNBC host Melissa Harris-Perry, who alongside her guests had cracked on-air jokes recently about a family photo featuring Romney's adopted African American grandson, Kieran.

"I think her apology was clearly heartfelt, and we accept that," Romney said on "Fox News Sunday."

Romney's son Ben and his wife, Andelyne, adopted Kieran last fall. The baby appeared in a family photo that Harris-Perry and her guests joked about late last year. Harris-Perry apologized -- first on Twitter and later in an emotional segment on her show Saturday.

No hard feelings, said the 2012 Republican presidential contender.

"I recognize that people make mistakes," Romney said. "And the folks at MSNBC made a big mistake. And they've apologized for it. And that's all you can ask for. I am going to move on from that. I'm sure they want to move on from it."

Romney also took aim at President Obama's signature health-care law. When asked whether he thought he would have defeated Obama had the president revealed during the campaign that some Americans would lose their health plans, Romney said he didn't know, but wishes he could go back and try again.

"I wish I could back and turn back the clock and take another try," he said. "But history is in the past."