He went to Cuba in the radical Venceremos Brigade to help Castro.In college, he was an activist in Movimiento Estudiantil Chicano de Aztlán (MEChA) - a Chicano separatist group with a Commie underpinning.
He then went to the Peoples College of Law (dedicated to producing public-interest lawyers) and failed the bar exam four times.
And more... Source: Loudon: Obama, Antonio Villaraigosa and the Harry Bridges Connection
Doesn’t he have something to do with La Raza as well?