The Trump administration on Monday plans to ask a federal court for another 90-day delay in a lawsuit over Obamacare insurance subsidies, according to two administration sources, leaving the future of the health care marketplaces in limbo through late August.

The suit, House v. Tom Price, centers on Obamacare’s cost-sharing program, which reimburses health insurers to help low-income people make co-payments at the doctor or hospital.