Wu emerged from the marathon hearing largely unscathed, and managed to land a few hits in the face of aggressive questioning.

Boston Mayor Michelle Wu racked up a six-figure bill with a high-powered law firm in preparation for Wednesday’s intense congressional hearing on sanctuary cities in Washington, D.C.

The Congressional hearing was part of a federal investigation into so-called "sanctuary cities."Committee Chairman James Comer, a Republican from Kentucky, launched the probe back in January to look into what he described as "the policies of sanctuary jurisdictions and their impact on public safety and federal immigration enforcement.