Republican Rep. Michael McCaul won reelection to a U.S. House seat representing Texas on Tuesday, defeating Democrat Theresa Boisseau. McCaul is a longtime member of the U.S. House, serving since 2005 and heading into his 11th term. The congressman has gained a reputation as a national security hawk in fierce support of Ukraine, an increasing point of division within the Republican Party. McCaul's district stretches from the Greater Houston to Austin areas. declared McCaul the winner at 9:37 p.m. EST.