Immigration and Customs Enforcement officials will be given access to the personal data of the nation’s 79 million Medicaid enrollees, including home addresses and ethnicities, to track down immigrants who may not be living legally in the United States,

The plan is the latest step by the Trump administration to gather sensitive information about people living in the U.S. as it seeks to crack down on illegal immigration.

More than 1,600 protests are planned across the country Thursday in honor of the late congressman and civil rights leader John Lewis.