Sasha and Malia better be on their best behavior; their grandma’s moving into the White House. Transition officials confirmed today that Michelle Obama's mother Marian Robinson will move into the president’s home with the rest of the family later this month. The 71-year-old Chicagoan was a mainstay of the Obama campaign, caring for Sasha and Malia while their parents were on the trail, and is expected to perform a similar role in the White House. The person happiest about the announcement? Joe Biden, who had previously been designated for the post of babysitter-in-chief.