U.S. Rep. Joaquin Castro, D-San Antonio, speaks to a group of Hillary Clinton supporters at a campaign event held at the home of Mark and Sharon Naughton in Iowa City on Aug. 30, 2015. Photo by Rebecca F. Miller for the Texas Tribune.
U.S. Rep. Joaquin Castro, D-San Antonio, speaks to a group of Hillary Clinton supporters at a campaign event held at the home of Mark and Sharon Naughton in Iowa City on Aug. 30, 2015. Photo by Rebecca F. Miller for the Texas Tribune.