Mayor Michelle Wu “expects to pay” up to $650,000 to prepare for tomorrow’s congressional hearing on sanctuary cities, the mayor’s office told the Herald.

The mayors of Boston, Chicago, Denver and New York City are set to testify before the House Committee on Oversight and Government on their sanctuary policies.

Boston Mayor Michelle Wu is preparing for a trip to Washington, D.C., this week, where she'll be challenged to defend the city's policy on not cooperating with federal immigration enforcement actions while facing criticism and the threat of funding cuts.