The U.S. Small Business Administration confirmed Thursday that it would pull regional offices from six large “sanctuary cities” over their unwillingness to cooperate with U.S. Immigration and Customs Enforcement.

The U.S. attorney general called out Boston Mayor Michelle Wu on social media Tuesday for the city's policy of not cooperating with federal immigration authorities.

A congresswoman says she plans to make criminal referrals to the U.S. Justice Department to investigate Boston Mayor Michelle Wu and three other mayors of so-called sanctuary cities. Why it matters: Boston leaders view the city's policy restricting police from helping with civil — not criminal — immigration enforcement as a stance welcoming people of all backgrounds and fostering trust between residents and police.

With Ash Wednesday ashes on her forehead and a baby on her shoulder, Boston Mayor Michelle Wu strode into a Capitol Hill hearing room two steps ahead of the Republicans who were looking to flambé her over her city’s lack of cooperation with federal immigration authorities.

Boston Mayor Michelle Wu went to the U.S. Capitol in Washington, D.C. for a hearing from the House Oversight Committee on so-called “sanctuary” laws in the cities of New York City, Chicago, Denver and Boston.

The U.S. Small Business Administration confirmed Thursday that it would pull regional offices from Denver and five other large “sanctuary cities.”