The U.S. Justice Department said on Thursday it was probing the release by an upstate New York sheriff's office of an immigrant living in the U.S. illegally, in what appears to be its first use of a new policy to target state and local agencies that do not comply with President Donald Trump's directives.

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

The city has been singled out as one of the nation’s four most problematic sanctuary cities and Mayor Michelle Wu has been asked to testify about its “sanctuary policies” at a public hearing next month,

The mayors of those cities are being called to testify before Congress. Fact check: $50 million for condoms in Gaza? Five big reasons to be skeptical Trump’s story is true

Four sanctuary cities are under federal investigation for their immigration policies, including Denver, Chicago, New York City and Boston.