Chicago Mayor Brandon Johnson is one of four mayors who have confirmed they will travel to Washington, D.C. at the beginning of March to testify on sanctuary cities.

Johnson and three other big-city mayors, all Democrats, will attend the March 5 hearing of the House Oversight and Government Reform Committee, which is investigating how local policies affect enforcement of President Donald Trump’s promise of mass deportations.

The U.S. Department of Justice is suing the State of Illinois and the City of Chicago, alleging that sanctuary status is obstructing federal immigration enforcement. Charlie De Mar reports.