President Trump’s Medicare director bashed Democrats’ embrace of expanding Medicare to all Americans, saying it will destroy the entitlement program.

Centers for Medicare & Medicaid Services Director Seema Verma said that proponents of Medicare for All do not understand the ramifications of the move. Her comments at a speech in San Francisco before the Commonwealth Club Wednesday comes as Medicare for All is gaining traction among Democrats and progressive candidates ahead of the 2018 midterms.