The Trump administration came into office with its top legislative priority clear: Repeal the Affordable Care Act. It failed. Then, when a group of Republican states tried to throw out Obamacare through a lawsuit, the administration agreed that a key part of the law was unconstitutional.

But now that defenders of the law have asked the Supreme Court to settle the case quickly, the president’s lawyers say they are in no particular hurry. The case, which seeks to invalidate the entire health care law, can wait for the lower courts to consider certain questions more carefully, they said in a filing to the Supreme Court on Friday. There is no “present, real-world emergency,” the brief says, that would require the court to rush the case’s progress.

The case argues that changes made to the Affordable Care Act in 2017 make its requirement that most Americans obtain health insurance unconstitutional — and that the provision is so essential to the health care law that the rest of it should be invalidated as well.

The case could have major political implications because the results sought by the Republican states and the Trump administration would cause substantial disruptions. According to estimates from the Urban Institute, around 20 million more Americans would become uninsured because of the elimination of the law’s coverage expansions and protections for Americans with pre-existing health conditions.