NPR's Mary Louise Kelly talks with Boston mayor Michelle Wu, who just welcomed her third child. She's the first Boston mayor to give birth while in office.

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

Mayor Michelle Wu will no doubt come up with some lame excuse for not testifying before Congress next month – maternity leave, racism, sexism, panic attack or some other equally bogus reason.

On Monday, the House Committee on Oversight and Government Reform opened a probe into so-called sanctuary cities for immigrants and has requested testimony from Boston Mayor Michelle Wu.

Mayor Michelle Wu is weighing how to respond to a call from congressional Republicans for her and other Democratic mayors to testify on Capitol Hill over their local immigration policies.

Boston Mayor Michelle Wu says her administration feels “very strongly that we’re on solid legal ground” in being a sanctuary city and is still reviewing a letter it received from Congress on getting called to testify on such policies.

Boston Mayor Michelle Wu brought her newborn daughter to work at City Hall on Tuesday. Mira Wu Pewarski was born on Jan. 13 at 2 p.m., weighing 8 pounds, 4 ounces and measuring 20 inches. She is the third child of the mayor and her husband, Conor.