FILE - This June 15, 2012 file photo shows Los Angeles Mayor Antonio Villaraigosa, right, introducing Vice President Joe Biden at the Annual Meeting of the U.S. Conference of Mayors, in

 

              FILE - This June 15, 2012 file photo shows Los Angeles Mayor Antonio Villaraigosa, right, introducing Vice President Joe Biden at the Annual Meeting of the U.S. Conference of Mayors, in
FILE - This June 15, 2012 file photo shows Los Angeles Mayor Antonio Villaraigosa, right, introducing Vice President Joe Biden at the Annual Meeting of the U.S. Conference of Mayors, in Orlando, Fla. Dozens of city leaders, including Villaraigosa and Vice-President Biden, will consider a resolution demanding gun control legislation during the 81st annual U.S. Conference of Mayors conference, which begins in Las Vegas Friday June 21, 2013.(AP Photo/John Raoux, File)