Paul Ryan is sworn in after being re-elected as House Speaker during the opening of the 115th U.S. Congress on Capitol Hill in Washington D.C., the United States, on Jan. 3, 2017. The 115th U.S. Congress convenes on Tuesday with Republican Paul Ryan re-elected as House Speaker as expected while outgoing Vice President Joe Biden presides over the old Senate chamber for the last time. (Xinhua/Yin Bogu)