Update to this story.

Via Politico:

MSNBC host Melissa Harris-Perry apologized in a series of tweets Tuesday morning for using Mitt Romney’s black adopted grandchild in a comedy segment over the weekend.

“I am sorry. Without reservation or qualification. I apologize to the Romney family,” the apology started. “I work by guiding principle that those who offend do not have the right to tell those they hurt that they (are) wrong for hurting. Therefore, while I meant no offense, I want to immediately apologize to the Romney family for hurting them.”

“As (a) black child born into large white Mormon family I feel familiarity w/ Romney family (picture) & never meant to suggest otherwise,” she continued. “I apologize to all families built on loving transracial adoptions who feel I degraded their lives or choices.”

In the segment, part of a larger hour taking a comedic look at 2013, Harris-Perry pulled up a Romney family photo with the newly adopted grandson, who is black, sitting on Mitt Romney’s knee.

One panelist, actress Pia Glenn, sang “one of these things is not like the other” with another joking that it was representative of the Republican Party’s lack of diversity. “It really sums up the diversity of the Republican Party, the RNC. At the convention, they find the one black person,” said comedian Dean Obeidallah.