Since new congressional district maps took effect in the 2012 elections, much of the population growth in those Republican districts has been among nonwhite voters, who overwhelmingly favor Democratic candidates.
Walters’s district has grown by 33,000 residents, according to U.S. Census Bureau figures. Of those new residents, 30,000 are nonwhite. The white population actually declined in Royce’s district while the overall population grew by 10,000 residents. In Denham’s district, 17,000 of the 21,000 new residents are nonwhite.