Julián Castro, the candidate: Julián Castro, former Democratic mayor of San Antonio, Texas, has lived the fabled American Promise. His campaign website says it best: Castro has immigrant roots and American dreams. Julián, and his identical twin brother Joaquin, are the sons of a single mother who is herself the child of an immigrant. Castro's grandmother Victoria immigrated to the U.S. alone at the age of 7 with only a fourth grade education. She worked her whole life as a maid. Her daughter grew up to become a teacher and a Chicana activist. Victoria's grandsons grew up to be Ivy-League educated public servants. Joaquin is a member of Congress. Julián was mayor and later HUD secretary during the Obama administration. The family has a lot to be proud of. Policy Positions: Education reform. Castro backs universal pre-K as well as two free years of higher education for all Americans Gun reform. The former San Antonio mayor advocates for...