Johnson also has been asked to hand over all documents and communications related Chicago's sanctuary policies.

Mayor Brandon Johnson says the city will continue to protect civil and human rights, a day after the mayor received a letter from Washington, D.C., stating, in summary, that Chicago and other “sanctuary cities” like it are being investigated by the U.

If Mayor Brandon Johnson refuses to appear as requested, it could open a new front in the ongoing battle with the GOP-controlled U.S House and the Trump administration, which is attempting to strip self-proclaimed sanctuary cities of all federal funding.