The justices heard arguments in a constitutional challenge to a task force that decides what treatments are covered at no cost.

The Supreme Court on Thursday agreed to hear oral arguments over President Donald Trump’s request to enforce a plan to end birthright citizenship against all but a handful of individuals, though it deferred a request from the administration that would have allowed it to implement its plan immediately.

Challengers said the Preventive Services Taskforce is unconstitutional because its members should be appointed by the president and approved by the Senate.