Mayor Julian Castro, center, stands with his wife, Erica Castro, their daughter, Carina, 3, and his brother, Joaquin Castro, right, on stage during the send-off party for their trip to

 

              Mayor Julian Castro, center, stands with his wife, Erica Castro, their daughter, Carina, 3, and his brother, Joaquin Castro, right, on stage during the send-off party for their trip to
Mayor Julian Castro, center, stands with his wife, Erica Castro, their daughter, Carina, 3, and his brother, Joaquin Castro, right, on stage during the send-off party for their trip to the Democratic National Convention at the St. Paul Community Center in San Antonio on Sept. 1, 2012. Castro delivers the convention's keynote address Tuesday, a nod to the importance of Hispanic voters in the race. (AP Photo/San Antonio Express-News, Lisa Krantz)