Chicago mayor to testify about sanctuary status Mayor Brandon Johnson has decided to testify before lawmakers on Capitol Hill next month as part of an investigation into U.S. sanctuary cities. House Committee on Oversight and Government Reform Chairman James Comer said that the mayors of Chicago,

House Oversight Committee Chairman James Comer (R-KY) sent letters Johnson and the mayors for three other major cities – Boston, Denver, and New York – last week, asking them to testify before the committee and hand over all documents and communications related to their city's sanctuary policies.