Trump has vowed to deport “millions” of undocumented migrants in his second term, after running an election campaign that focused on illegal immigration. Among other measures, he has invoked rare wartime legislation to fly hundreds of alleged members of a Venezuelan gang to El Salvador, which is imprisoning the migrants.

A US federal judge in Massachusetts on Monday blocked an order issued by the Trump Administration that sought to revoke the legal status and work permits of nearly 500,000 migrants from Cuba, Haiti,