There’s no backup plan should the Supreme Court strike down a major part of the Affordable Care Act this year, a top Obama administration official wrote to Congress Tuesday.

“We know of no administrative actions that could, and therefore we have no plans that would, undo the massive damage to our health care system that would be caused by an adverse decision,” Health and Human Services Secretary Sylvia Mathews Burwell wrote to Sen. Orrin Hatch, R-Utah.