Sen. Elizabeth Warrensaid Tuesday that opposing the Republican health care bill wasn’t enough, and the Democratic Party should start running on a new national single-payer plan.

“President Obama tried to move us forward with health-care coverage by using a conservative model that came from one of the conservative think tanks that had been advanced by a Republican governor in Massachusetts,” she told the Wall Street Journal. “Now it’s time for the next step. And the next step is single payer.”

Polling has shown government-provided health care to be a very popular notion among Americans. Depending on whether it’s described as a public option, Medicare for all, or federally funded universal health care, proposals are supported by 57 to 61 percent of Americans, compared with only 19 to 24 percent opposed.

Sen. Bernie Sanders running for the Democratic presidential nomination in 2016 with Medicare for all as a key promise brought a great deal of attention to the issue.