The Trump administration asked the Supreme Court on Thursday to allow a ban on birthright citizenship in about half of the country for children born to undocumented immigrants and foreign visitors.

The Trump administration is pushing for the the U.S. Supreme Court to allow some restrictions on birthright citizenship even as legal battles continue over President Donald Trump’s orders to end what has long been seen as a constitutional promise.

Trump administration lawyers asked the justices to limit the sweep of decisions by three lower courts that issued nationwide pauses on the policy.