It was a dramatic moment during a Capitol Hill hearing that presented no shortage of dramatic moments. Brandishing paperwork, U.S. Rep. Anna Paulina Luna, R-Fla., threatened to set the full power of the U.

Boston Mayor Michelle Wu testified before a House committee on so-called "sanctuary cities" in Washington Wednesday.

A GOP-led committee questioned mayors Wednesday on their limited cooperation with federal immigration authorities. Boston's Mayor Wu has argued the policy keeps the city safe and builds trust with diverse communities.

Immigrants and advocates asked Boston City Councilors on Monday to preserve and strengthen the Trust Act, the law that limits police coordination with federal immigration authorities except for on criminal investigations.

Fresh off the mayor’s defense of the city’s sanctuary policies and public safety record before a Congressional oversight committee, the Boston City Council held a community-based hearing where advocates pushed for expansion of the Trust Act.