The Trump administration wants to crack down on illegal immigrants using government services by strengthening checks around federally subsidized housing.

The Washington Post reported Thursday the Department of Housing and Urban Development will beef up its verification process for people who request housing help.

“We need to make certain our scarce public resources help those who are legally entitled to it,” HUD Secretary Ben Carson said, according to the Post. “Given the overwhelming demand for our programs, fairness requires that we devote ourselves to legal residents who have been waiting, some for many years, for access to affordable housing.”

Illegal aliens are not eligible to receive subsidies for federal housing programs, but families comprised of both illegal and legal immigrants are eligible — as long as someone with a legal status serves as the head of household.

HUD believes there are roughly 32,000 households illegally taking advantage of federal housing subsidies, the Post reported.

The Trump administration is trying to close loopholes and crack down on illegal immigration, particularly as several caravans from Central America make the long journey from their home countries to the U.S. and ask for asylum.