FILE - In this June 11, 2013 file photo, San Antonio, Texas Mayor Julian Castro, center, applauds President Barack Obama in the East Room of the White House in Washington after the president spoke about immigration reform. From left are, Los Angeles Police Chief William Bratton, US Chamber of Commerce CEO Thomas Donohue and Castro. Castro was seen as the Democratic star that could eventually rise to prominence in the deep red state of Texas. But with his party still years away from capitalizing on a demographic shift that could help Democrats compete for statewide power, the San Antonio mayor has opted instead to build his political clout in Washington as part of President Barack Obama’s Cabinet. (AP Photo/Evan Vucci, File)