This rejection was said at a hearing in Washington, D.C. The mayors from Boston, Chicago, New York, and Denver were summoned to testify in Congress. Answering questions about their so-called "Sanctuary cities" for undocumented immigrants.

Johnson is appearing before the Committee on Oversight and Government Reform to defend the city’s law that, in part, restricts police from detaining people solely based on their immigration status.

Johnson faced numerous GOP attacks — including digs at his low approval rating — during Wednesday's hearing as both Republicans and Democrats used the opportunity to give political stump speeches on immigration.