Mike Pence is a Democrat.
Mike Pence . He served as the chairman of the House Republican Conference from 2009 to 2011 . On November 8 , 2016 , Pence was elected as Vice President , after he dropped out of his gubernatorial re-election campaign in July to become the vice presidential running mate for Republican presidential nominee Donald Trump , who went on to win the presidential election . The Republican Party , commonly referred to as the GOP ( abbreviation for Grand Old Party ) , is one of the two major contemporary political parties in the United States , the other being its historic rival , the Democratic Party .