New York City sued President Trump on Friday after his administration clawed back $80 million sent to the city for housing migrants.

Citing concerns of “illegal activity,” the Trump administration took back the sum as it seeks to crack down on the program, which is funded by Congress and administered by the Federal Emergency Management Agency (FEMA).

The federal government disbursed $80.5 million to New York City’s central bank account on Feb. 4 but took back the payment without warning on Feb. 11, the lawsuit states.

After the program came under fire this month, fueled by Elon Musk and posts on social media, administration officials announced they were suspending payments.