Hillary Clinton is not only saying that Bernie Sanders vision of a single-payer health care system is unrealistic, but that it, if implemented, would be a disaster for those it intends to help.

At the last debate between the two candidates for the Democratic nomination, Clinton, who has lost six consecutive primaries to her opponent, sought to portray Sanders’ policies not only as unachievable, but fundamentally flawed.

Clinton referenced a recent column in the Washington Post, by Max Ehrenfreund, which argued that Sanders’ health plan would cost more for low-income Americans than the status quo. Millions who are currently enrolled in Medicaid already pay very little for care, Ehrenfreund pointed out, but they would end up paying more in payroll taxes to finance Sanders' single-payer system.