A member of the Democratic Party , as a national co-chairman of Hillary Clinton 's presidential campaign , and as a member of President Barack Obama 's Transition Economic Advisory Board , and as Chairman of the 2012 Democratic National Convention in September 2012 .
Villaraigosa served as a national co-chairman of Hillary Rodham Clinton 's 2008 Presidential campaign , and as a member of President Barack Obama 's Transition Economic Advisory Board .