Joaquin Castro is a member of the U.S. House, representing Texas' 20th Congressional District. He assumed office on January 3, 2013. His current term ends on January 3, 2027. Castro is running for re-election to the U.S. House to represent Texas' 20th Congressional District. He is on the ballot in the general election on November 3, 2026. He advanced from the Democratic primary on March 3, 2026.