In a letter sent to Mayor Michelle Wu, Comer said that sanctuary cities like Boston are using “misguided and obstructionist policies” to shield migrants from law enforcement.

Boston Mayor Michelle Wu was one of four mayors called before the House's Committee on Oversight and Government Reform to testify on their status as sanctuary cities.

In a statement, a city spokesperson said, “We are proud that Boston is the safest major city in the United States. We have received the letter and are reviewing it.”

Republican Rep. James Comer of Kentucky has asked Wu to appear before a House committee next month, as it investigates 'sanctuary' communities and whether they are preventing federal immigration agents from removing dangerous criminals.

The city has been singled out as one of the nation’s four most problematic sanctuary cities and Mayor Michelle Wu has been asked to testify about its “sanctuary policies” at a public hearing next month,

Boston Mayor Michelle Wu has been asked to testify at a Congressional hearing as part of a federal investigation into sanctuary cities.

Boston Mayor Michelle Wu, along with mayors from Denver, New York and Chicago, was called to testify before the U.S. House Oversight and Government Reform Committee regarding sanctuary city

The U.S. House Oversight and Government Reform Committee has launched an investigation into sanctuary jurisdictions and the impact of their policies on public safety and federal immigration enforcement.