Boston Mayor Michelle Wu testified before a House committee on so-called "sanctuary cities" in Washington Wednesday.

Boston Mayor Michelle Wu will surely face a hostile environment from House Republicans when she testifies about immigration enforcement.

Wu was one of four Democratic mayors called before the committee. The three others — Eric Adams of New York City, Brandon Johnson of Chicago, and Mike Johnston of Denver — chose not to give the yes or no answer requested by Representative Nancy Mace of South Carolina when she asked, “Is breaking into our country against the law?”