Mayor Wu has yet to officially launch her reelection campaign, but she couldn’t ask for a bigger stage to show why she deserves four more years.

She stood up for the city and refused to cower in the face of threats and smears,” one of more than 480 respondents said.

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.