The Justice Department will investigate state and local officials who stand in the way of President Donald Trump's immigration crackdown: memo.

The president’s Day 1 actions included directives that fly in the face of legal limits on involving the military in domestic operations and the constitutional guarantee of birthright citizenship.

A top US Justice Department official installed by Donald Trump warned prosecutors that they must comply with the president’s hard-line immigration agenda and laid the groundwork for a clash with state and city officials who don’t cooperate with the administration’s crackdown.