FILE – In this Dec. 14, 2011 file photo, President Barack Obama and first lady Michelle Obama arrive on the South Lawn of the White House in Washington. First lady Michelle Obama is a behind-the-scenes force in the White House whose opinions on policy and politics drew her into conflict with presidential advisers and who bristled at some of the demands and constraints of life as the president’s wife, according to a detailed account of the first couple’s relationship. (AP Photo/Haraz N. Ghanbari, File)