Today is International Workers Day. Supporters of immigrant rights in several U.S. cities are leading their third annual May Day march. Chicago’s march could be one of the biggest. We report from our West Side bureau.

Organizers aren’t expecting attendance as big as in 2006 or 2007. But they are predicting an impact on this year’s elections. Emma Lozano spoke yesterday at a West Side church where a Mexican woman is living in open defiance of a deportation order.

LOZANO: We are the new majority. We’re marching all the way to November. And we are going to take back the government for every single worker and every single family in the United States of America.

The day begins at 10 a.m. with entertainment in Union Park. At around noon, the crowd will march to Federal Plaza. That’s if the Chicago police don’t reroute it to Grant Park, like last year.

In either case, scheduled speakers include Mayor Richard Daley. And guitarist Tom Morello is set to play. He’s a Chicago-area native who helped form the band Rage Against the Machine.