Sen. Bernie Sanders Bernie SandersSirota reacts to report of harassment, doxing by Harris supporters Republicans not immune to the malady that hobbled Democrats The Hill's Morning Report - Sponsored by Facebook - Republicans lawmakers rebuke Trump on election MORE (I-Vt.) on Saturday slammed the Republican's proposal to repeal and replace ObamaCare, calling it a "moral outrage that this country will never live down."

"A great nation is judged ... by how well it treats the most vulnerable people in this country," Sanders said in a speech during his "Don't Steal Our Health Care" bus tour stop in Pittsburgh Saturday.

"We will not allow 23 million Americans to be thrown off of the health insurance they currently have in order to give more than $500 billion in tax breaks to the top two percent, to the insurance companies, to the drug companies and to other multi-national companies," Sanders said to cheers. "Plain and simple, this so-called healthcare bill is a massive transfer of wealth from working families to the very very rich.

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"This is a barbaric and immoral piece of legislation," he added.

Sanders is headlining three rallies in Pennsylvania, Ohio and West Virginia over the weekend as he joins Democratic efforts to stop the push to repeal and replace ObamaCare.

MoveOn.org is hosting the tour and said it will target three GOP senators — Pat Toomey (Pa.), Rob Portman Robert (Rob) Jones PortmanMcConnell locks down key GOP votes in Supreme Court fight Romney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery MORE (Ohio) and Shelley Moore Capito Shelley Wellons Moore CapitoCongress must finish work on popular conservation bill before time runs out Second GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure MORE (W.Va.) — to lobby for efforts against the Senate bill.