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

White House hopeful Sen. Bernie SandersBernie SandersOcasio-Cortez: Sanders' heart attack was a 'gut check' moment Ocasio-Cortez tweets endorsement of Sanders Ocasio-Cortez throws support to Sanders at Queens rally MORE (I-Vt.) rebuked his presidential opponent Rep. Tim RyanTimothy (Tim) John RyanThe Hill's Campaign Report: Biden camp faces new challenges Third-quarter fundraising sets Sanders, Warren, Buttigieg apart The Hill's 12:30 Report: Hunter Biden speaks out amid Ukraine controversy 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 WarrenTrump says his Doral resort will no longer host G-7 after backlash Ocasio-Cortez: Sanders' heart attack was a 'gut check' moment Ocasio-Cortez tweets endorsement of Sanders 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 Campaign Report: Biden camp faces new challenges Warren's surge brings new scrutiny to signature wealth tax 'We lost a giant': 2020 Democrats mourn the death of Elijah Cummings 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.