Dueling rallies between immigration enforcement supporters and sanctuary city advocates are set to take over Boston City Hall Wednesday as Mayor Michelle Wu testifies on the city’s limited

Boston Mayor Michelle Wu said Tuesday she would "never back down from an opportunity to defend" the city, as she prepared to do just that before Congress on Wednesday.

When Mayor Wu goes to Washington, D.C, to defend Boston's status as a "sanctuary city," she will be articulating a moral argument, not a political one, argues one letter writer.