Hampton Dellinger, head of the Office of Special Counsel, sued the Trump administration earlier this month after the president fired him.

The court’s order indicated that it may return to the issue as soon as next week, when a trial judge’s temporary restraining order is set to expire.

Russian Foreign Minister Sergei Lavrov will visit Turkey on Monday to discuss his country's recent talks with U.S. officials on ending the war in Ukraine, and how Ankara can contribute to the process, a Turkish foreign ministry source said on Sunday.