Health and Human Services Secretary Alex Azar launched a broadside Wednesday at Democrats’ embrace of expanding Medicare to every American, calling it unsustainable.

“Under the [Affordable Care Act], you were promised that if you liked your plan, you could keep your plan, and if you liked your doctor, you could keep your doctor,” Azar said during a speech in Nashville on Thursday, referring to President Barack Obama’s infamous proclamation that later were belied by medical plan cancellations. “But under Medicare for all, no one’s even promising that you can keep your plan, or keep your doctor.”