In the lead-up to the presidential election, Trump said he would carry out the “largest deportation program” in U.S. history—though efforts appear to have slowed down.

The Trump administration is expected to invoke a sweeping wartime authority to speed up the president’s mass deportation pledge in the coming days, according to four sources familiar with the discussions.

The Trump administration is preparing to invoke the Alien Enemies Act of 1798, a rarely used wartime authority, to fast-track its sweeping mass deportation operation, according to sources familiar with the plan.