Sanders to Tim Ryan: 'I do know that, I wrote the damn bill'

White House hopeful Sen. Bernie SandersBernie SandersKaine: Obama called Trump a 'fascist' during 2016 campaign Des Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters MORE (I-Vt.) rebuked his presidential opponent Rep. Tim RyanTimothy (Tim) RyanOffice of Technology Assessment: It's time for a second coming Key moments in the 2020 Democratic presidential race so far GM among partners planning .3B battery plant in Ohio MORE (D-Ohio) after Ryan questioned how comprehensive his “Medicare for All” platform would be.

Sanders maintained that his Medicare for All platform would offer more comprehensive health care coverage for people who would eventually lose their private plans, noting that it would include dental and vision plans for seniors as well as other facets, to which Ryan responded “You don’t know that, Bernie.”

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“I do know that, I wrote the damn bill,” Sanders fired back to applause, referencing the Medicare for All bill he’s introduced in the Senate.

The exchange was part of a longer, fiery debate among the field about the federal government’s role in providing health care, with Sanders and Sen. Elizabeth WarrenElizabeth Ann WarrenDes Moines Register endorses Elizabeth Warren as Democratic presidential nominee Sanders faces lingering questions about appeal to women voters Sunday shows preview: Lawmakers prepare for week two of impeachment trial MORE (D-Mass) supporting a Medicare for All platform

But several moderates touted different plans that would allow Americans to keep private insurance and either expand the Affordable Care Act or include a public option to supplement private plans.

“Why do we got to be the party of taking something away from people?” former Rep. John DelaneyJohn Kevin DelaneyThe Hill's Morning Report - Trump trial begins with clash over rules Elizabeth Warren moves 'bigly' to out-trump Trump DNC goof: Bloomberg should be on debate stage MORE (D-Md.), a staunch centrist, asked during the debate.

Polling has showed that health care has emerged as a top issue for Democratic voters, though what should be the solution to rising premiums and scant coverage has produced a sharp divide within the primary field.