Monday was International Workers’ Day, or May Day, and immigrants rights groups across the country hit the streets in protest of President Trump’s policies on immigration.

Here in Phoenix, immigrants rights group Puente, along with Fair Immigration Reform Movement and the Center for Community Change, are organizing a march from the state Capitol to the Fourth Avenue Jail, in protest of the Maricopa County Sheriff’s Office’s policies on handing over inmates to immigration authorities.

I spoke with Maria Castro, a community organizer with Puente who’s leading the action team for the International Worker’s Day protest. She says they’re expecting more than 500 people to march in Phoenix today.

This is all part of a much bigger, international day of action for workers rights groups worldwide. Here in the United States, the numbers of protests are expected to swell in response to Trump’s nationwide crackdown on immigration.

Back in 2006 when there were massive immigrants rights protests here and in Los Angeles in response to anti-immigrant legislation in Congress on May Day.

Organizers are saying today will be the largest protests since that year. And, in fact, protests surrounding International Workers Day began in the late 1800s when a protest went wrong in the Haymarket District of Chicago.

I spoke with Mary Margaret Fonow about this. She’s the founding director of ASU’s School of Social Transformation and she says after the Civil War, there had been growing strikes, protests and rallies around workers rights issues and getting an eight-hour work day.