A congressional committee on Monday asked Denver Mayor Mike Johnston to testify in Washington, D.C., next month to defend the city’s policies limiting local police cooperation with federal

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 policies in a letter Monday morning.

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.”