While Mayor Wu prepares to face the heat in Washington, President Donald Trump's border czar has again suggested that he would personally come to Boston.

Boston Mayor Michelle Wu will find herself testifying before a Congressional committee Wednesday with a hostile Republican majority intent on grilling her and three other Democratic mayors on their limited cooperation with federal immigration enforcement.

Denver Mayor Mike Johnston is working with former Biden lawyer Dana Remus as the city prepares to gather — and redact — documents that might expose municipal employees to political attacks for helping migrants.

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.