FILE - Rep. David Valadao, R-Calif., poses during a ceremonial re-enactment of his swearing-in ceremony in the Rayburn Room on Capitol Hill in Washington on Jan. 6, 2015. California is a heavily Democratic state, but the Republican Party retains pockets of strength in U.S. House districts that will be among the country's marquee elections in the fight to control Congress. (AP Photo/Jacquelyn Martin, File)