Mr. Castro comes to Washington

CHARLOTTE, NC - SEPTEMBER 02: San Antonio Mayor Julian Castro stands on stage during preparations for the Democratic National Convention at Time Warner Cable Arena on September 2, 2012 in Charlotte, North Carolina. The DNC that will start on September 4 and run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)
CHARLOTTE, NC - SEPTEMBER 02: San Antonio Mayor Julian Castro stands on stage during preparations for the Democratic National Convention at Time Warner Cable Arena on September 2, 2012 in Charlotte, North Carolina. The DNC that will start on September 4 and run through September 7, will nominate U.S. President Barack Obama as the Democratic presidential candidate. (Photo by Streeter Lecka/Getty Images)

    JUST WATCHED

    Mr. Castro comes to Washington

MUST WATCH

San Antonio Mayor Julian Castro is coming to Washington. Our panel weighs in on what it might mean for him and 2016.