Democratic presidential candidate Sen. Barack Obama, D-Ill., right, is greeted by Los Angeles Mayor Antonio Villaraigosa, Tuesday, July 8, 2008, at the League of United Latino American Citizens in Washington. (AP Photo/Jae C. Hong) Here's Presidential hopeful Sen. Barack Obama pumping fists with Los Angeles Mayor Antonio Villaraigosa at yesterday's League of United Latin American Citizens convention in Washington D.C. The Illinois Senator wasn't the mayor's first choice, but he's certainly showing "dedication" as......