A couple hundred community, labor and immigration activists have gathered in a Detroit park rally for better working conditions, immigration reform and other issues.
The demonstration Wednesday is part of the May Day protests around the nation and globe.
Several speakers called on Washington lawmakers to work quickly to enact a federal overhaul of the immigration system.
Congress is considering legislation to legalize the status of many of the estimated 11 million people living in the U.S. without authorization.
Organizations include United Auto Workers and AFL-CIO locals and the immigration rights coalition Michigan United.
Organizers say combining the groups' interests is important to the effort of strengthening the rights of all workers.
About 50 labor supporters rallied in Flint, with other events scheduled in Grand Rapids and Kalamazoo.