U.S. President Barack Obama, second from right, enters the Blue Room to take the oath of office from U.S. Supreme Court Chief Justice John Roberts, right, followed by daughters Sasha Obama, left, Malia Obama, second from left, and first lady Michelle Obama at the White House in Washington, D.C., U.S., on Sunday, Jan. 20, 2013. As he enters his second term Obama has shed the aura of a hopeful consensus builder determined to break partisan gridlock and adopted a more confrontational stance with Republicans. Photographer: Larry Downing/Pool via Bloomberg