Melissa Harris-Perry apologized Tuesday for a controversial segment on her show about Mitt Romney's adopted grandson, Kieran, who is black.

The MSNBC host came under fire after joking about a photo of the Romney family that showed Romney holding his newest grandson on his knee. During her show Sunday, Harris-Perry had shown the photo and asked her panel for caption ideas. The roundtable joked about the baby being the only black person in the picture....