Durham, New Hampshire (CNN) Sen. Elizabeth Warren said Wednesday that she will "of course" consult with Sen. Bernie Sanders about her soon-to-be-released plan on how to pay for "Medicare for All," but that she has not yet discussed those details with him.

"I'm glad to talk to Bernie about this," Warren told reporters after a campaign rally in Durham, New Hampshire.

Warren has come under blistering criticism over the past few weeks from her Democratic primary rivals who oppose a swift move to a single-payer health care system. The Massachusetts senator is a co-sponsor, twice over, of Sanders' signature health care bill, saying as a presidential candidate: "I'm with Bernie on Medicare for All."

In recent months, critics have increasingly assailed Warren over her vague answers to questions about how the program would be funded, particularly when she's been pressed on whether middle class tax hikes would be necessary to make the numbers work. On the heels of the CNN/New York Times debate in Ohio, where she repeatedly came under fire, Warren announced that her campaign would soon release its own financing plan -- opening up the possibility that the two leading progressives could ultimately disagree on how to fund Medicare for All.

Former Vice President Joe Biden, Sen. Amy Klobuchar and South Bend, Indiana, Mayor Pete Buttigieg, have sought to use the issue as part of a broader attack on Warren's trustworthiness -- and her "I have a plan for that" branding.

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