Guzman, now retired, taught high school math in San Antonio. Jesse Guzman is the father of San Antonio and national Democratic Politicians Julian and Joaquin Castro, photographed outside the Southwest School of Art in downtown San Antonio on Friday, April 5, 2019. Matthew Busch / Contributor, Contributor / San Antonio Express News Show More Show Less 5 of7 His twin brother Joaquin Castro is a U.S. Julian Castro is the former San Antonio Mayor and Secretary of Housing and Urban Development under President Obama, and current Democratic Presidential hopeful. Matthew Busch / Contributor, Contributor / San Antonio Express News Show More Show Less 4 of7 Matthew Busch / Contributor, Contributor / San Antonio Express News Show More Show Less 3 of7 Matthew Busch / Contributor, Contributor / San Antonio Express News Show More Show Less 2 of7