Mayor Wu is both gearing up for a competitive race against Kraft and preparing to testify before Congress about Boston's "sanctuary" policies.

With Josh Kraft officially kicking off his campaign to challenge incumbent Mayor Michelle Wu, battle lines are beginning to take shape in Boston's mayoral race.

Kraft’s recusal from a project with a major impact on traffic and parking in Charlestown gave Wu instant fodder for an attack on whether Kraft will truly represent his constituents or his family