Boston is preparing for another face-off with the federal government after President Donald Trump signed an executive order Monday to publish a list of so-called “sanctuary cities” around the country.

During his first 100 days of his second term, President Donald Trump has used federal funding as leverage to tackle his key policies issues. The latest threat is pointed right at states and cities that do not comply with his federal immigration policies.

Sanctuary policies, according to the president’s order, are “a lawless insurrection against the supremacy of Federal law and the Federal Government’s obligation to defend the