San Antonio Mayor Julian Castro speaks at the University of North Texas

San Antonio Mayor Julian Castro and his mentor from Stanford, political science professor, Dr. Luis Fraga, speak during the public forum titled “A Conversation on Political Leadership in the Future of American Politics.”

San Antonio Mayor Julian Castro, right, and his mentor and political science professor from Stanford, Dr. Luis Fraga, speak to the media before holding a public forum titled “A Conversation on Political Leadership in the Future of American Politics” at the University of North Texas in Denton, Texas, Wednesday, February 27, 2013. Photo by Brandon Wade

San Antonio Mayor Julian Castro, left, discusses his goals as mayor as his mentor and political science professor from Stanford, Dr. Luis Fraga, listens during a public forum titled “A Conversation on Political Leadership in the Future of American Politics” at the University of North Texas in Denton, Texas, Wednesday, February 27, 2013. Photo by Brandon Wade

San Antonio Mayor Julian Castro, left, discusses his goals as mayor as his mentor and political science professor from Stanford, Dr. Luis Fraga, listens during a public forum titled “A Conversation on Political Leadership in the Future of American Politics” at the University of North Texas in Denton, Texas, Wednesday, February 27, 2013. Photo by Brandon Wade

San Antonio Mayor Julian Castro talks about his goals as mayor during a public forum titled “A Conversation on Political Leadership in the Future of American Politics” at the University of North Texas in Denton, Texas, Wednesday, February 27, 2013. Photo by Brandon Wade