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.

Mayor Michelle Wu “expects to pay” up to $650,000 in city funds to prepare for a high-stakes congressional hearing on sanctuary cities and is bringing along a dozen staff members at an additional cost of $8,

The House Committee on Oversight and Government Reform called on the mayors of Boston, Chicago, Denver and New York to speak about their cities’ immigration policies.