The United States will no longer allow people who enter the country illegally to claim asylum, officials said Thursday, unveiling a controversial new crackdown on immigration.

The restriction on asylum claims will seek to address what a senior administration official called the “historically unparalleled abuse of our immigration system” along the border with Mexico.

The new rule was published by the Department of Homeland Security and is expected to get President Donald Trump’s signature shortly — as well as face court challenges.