President Donald Trump signed an executive order Wednesday to bar undocumented migrants from accessing public benefits, even though they’re already denied most federally funded programs—his latest move to tamp down on illegal immigration, though it wasn’t immediately clear which initiatives would be impacted.

The Trump administration has removed the acting Director of US Immigration and Customs Enforcement from his position as officials urge the administration to ramp up deportations of undocumented immigrants.

The demotion of top two officials in ICE’s enforcement division comes as officers scramble to ramp up the number of immigration arrests and deportations.