The Trump administration’s new immigration enforcement chief said Tuesday that he is preparing to increase arrests and deportations of migrant families living illegally in the U.S. interior, promising the kind of more-aggressive approach the White House has been seeking.

Mark Morgan, the new acting director of U.S. Immigration and Customs Enforcement, told reporters that his agency is preparing to move forward with a plan — stalled under his predecessor — that will target thousands of families that have disobeyed court orders to leave the country.

“Our next challenge is going to be interior enforcement,” Morgan said. “We will be going after individuals who have gone through due process and who have received final orders of deportation.