Democratic presidential candidate Hillary Rodham Clinton, left, and Housing and Urban Development Secretary Julian Castro, right, visit with supporters during a campaign event, Thursday, Oct. 15, 2015, in San Antonio.
Democratic presidential candidate Hillary Rodham Clinton, left, and Housing and Urban Development Secretary Julian Castro, right, visit with supporters during a campaign event, Thursday, Oct. 15, 2015, in San Antonio. Eric Gay AP
Democratic presidential candidate Hillary Rodham Clinton, left, and Housing and Urban Development Secretary Julian Castro, right, visit with supporters during a campaign event, Thursday, Oct. 15, 2015, in San Antonio. Eric Gay AP