President Donald Trump could soon deploy thousands of additional troops to the southern border, following through his campaign promise of a sweeping immigration crackdown. Meanwhile, federal prosecutors have reportedly been directed to investigate officials who resist immigration enforcement efforts and eliminate restrictions on arrests at schools,

New York Gov. Kathy Hochul said the state is willing to cooperate with the Trump administration’s efforts to deport undocumented migrants suspected of entering the country illegally — but only under certain circumstances.

In a display of force aimed at increasing arrests and generating publicity, the administration targeted the nation’s largest city, where sanctuary policies limit cooperation with ICE.

President Trump began his immigration crackdown with a flurry of executive orders. Immigration experts say they lay out how he hopes to transform enforcement at the southern U.S. border and beyond.

Some of Trump’s actions have taken effect immediately. Others are facing legal challenges or will require additional funding.