U.S. President-elect Donald Trump, left,  takes the oath of office with Supreme Court Chief Justice John Roberts, right, during the 58th presidential inauguration in Washington, D.C., U.S., on Friday, Jan. 20, 2017. Donald Trump will become the 45th president of the United States today, in a celebration of American unity for a country that is anything but unified. Photographer: Pat Benic/Pool via Bloomberg