Social Issues

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FILE - In this May 21, 2014 file photo, William Roletter, left, and Paul Rowe, press close to one another as they apply for their marriage certificate at City Hall in Philadelphia. Pennsylvania's ban on gay marriage was overturned by U.S. District Judge John E. Jones III on May 20. (AP Photo/Matt Rourke, File)

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FILE - In this May 20, 2014 file photo, from right, Viola Vetterm and her wife Kate Potalivo, and Amber Orion and her partner, Joy Payton listen to a speaker during a rally at City Hall in Philadelphia. Pennsylvania's ban on gay marriage was overturned by U.S. District Judge John E. Jones III on May 20. (AP Photo/Matt Slocum, File)

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FILE - In this Sept. 4, 2012 file photo, San Antonio Mayor Julian Castro speaks to delegates at the Democratic National Convention in Charlotte, N.C. 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/Lynne Sladky, File)

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FILE - In this April 8, 2014 file photo, moderator Brian Sweany, senior executive editor at Texas Monthly, left, speaks with San Antonio Mayor Julian Castro, center, and former Mississippi Gov. Haley Barbour at the Civil Rights Summit at the Lyndon B. Johnson Presidential Library in Austin, Texas. 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/Statesman.com, Deborah Cannon, Pool, File)

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FILE - In this Sept. 15, 2013 file photo, Vice President Joe Biden talks with San Antonio Mayor Julian Castro, right, during Iowa Sen. Tom Harkin's annual fundraising steak fry dinner in Indianola, Iowa. 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/Charlie Neibergall, File)

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FILE - In this June 8, 2012 file photo, San Antonio Mayor Julian Castro gives the keynote address at the Texas Democratic Convention in Houston. 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/Pat Sullivan, File)

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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)

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FILE - In this Sept. 4, 2012 file photo, San Antonio Mayor Julian Castro speaks to delegates at the Democratic National Convention in Charlotte, N.C. 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/Charlie Neibergall, File)

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FILE - In this March 29, 2013 file photo, San Antonio Mayor Julian Castro throws out the first pitch prior to an exhibition baseball game between the Texas Ranges and the San Diego Padres in San Antonio. 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/Eric Gay, File)

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FILE - In this Sept. 4, 2012 file photo, San Antonio Mayor Julian Castro addresses the Democratic National Convention in Charlotte, N.C. 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/J. Scott Applewhite, File)

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FILE - In this Oct. 25, 2012 file photo, former President Bill Clinton, second from left, stands with fellow democrats State Rep. Pete Gallego, D-Alpine, left, San Antonio Mayor Julian Castro, and U.S. congressional hopeful Joaquin Castro, right, during a campaign rally in San Antonio. 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/Eric Gay, File)