The Trump administration has moved with lightning speed to roll out the president’s immigration agenda, effectively closing off the US southern border to asylum seekers, severely limiting who’s eligible to enter the United States and laying the groundwork to swiftly deport migrants already in the country.

President Donald Trump signed a spate of executive actions that have already had wide-ranging impacts for people both inside and outside the US. By Wednesday, incoming refugee flights were canceled, troops were moving to the border, federal authorities were given permission to arrest people in or near schools and churches, and the pool of undocumented immigrants eligible for quick deportation without a judicial hearing was expanded.

Behind the scenes, federal agencies, like the Justice Department, were standing up their immigration crackdown, firing people in key leadership roles who oversee the nation’s immigration courts and threatening to prosecute state and local officials..