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.

Boston Mayor Michelle Wu entered a high-stakes Republican-led Congressional hearing while holding her baby daughter, who became a star of sorts in the day’s proceedings, where she was mentioned by

The theatrical hearing reflected enormous tensions as President Donald Trump continues a major crackdown on undocumented immigration, with Democrats and Republicans sparring over the course of proceedings.