Senate Democrats are fuming over a coronavirus stimulus package being circulated by Republicans.

Democrats emerged from a closed-door caucus lunch arguing that the bill fell short on several key provisions and urging Senate Majority Leader Mitch McConnell Addison (Mitch) Mitchell McConnellOcasio-Cortez to voters: Tell McConnell 'he is playing with fire' with Ginsburg's seat McConnell locks down key GOP votes in Supreme Court fight Video shows NYC subway station renamed after Ruth Bader Ginsburg MORE (R-Ky.) to delay an initial procedural vote — something he ultimately agreed to, rescheduling the 3 p.m. vote for 6 p.m.

Sen. Joe Manchin Joseph (Joe) ManchinNames to watch as Trump picks Ginsburg replacement on Supreme Court Momentum growing among Republicans for Supreme Court vote before Election Day Gardner on court vacancy: Country needs to mourn Ginsburg 'before the politics begin' MORE (D-W.Va.), one of the most conservative members within the Senate Democratic caucus, called the draft proposal the “same old repeated story from Mitch McConnell.”

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The procedural vote is slated to be on a "shell bill," a placeholder while the Senate finalizes language for the legislation.

“I’m not going to vote yes then no and this and that. ...If they can work out something between now and three, then that’s fine,” Manchin added.

Sen. Chris Van Hollen Christopher (Chris) Van HollenDemocrats fear Russia interference could spoil bid to retake Senate Mid-Atlantic states sue EPA over Chesapeake Bay pollution Trump payroll-tax deferral for federal workers sparks backlash MORE (D-Md.) called the GOP bill “bad news” and that it was focused on “bailing out the biggest corporations."

Sen. Ed Markey Edward (Ed) John MarkeySchumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Democrats see fundraising spike following Ginsburg death Democratic senator calls for eliminating filibuster, expanding Supreme Court if GOP fills vacancy MORE (D-Mass.) called it "totally inadequate."

Democrats have outlined a laundry list of objectionable provisions, arguing that the bill does not expand paid sick leave and actually caps how much employers have to pay.

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A source familiar with the GOP bill text also said Republicans are “refusing to add strong worker protections” and have included language requiring companies keep employees “to the extent possible.”

Democrats worry the language is vague enough that corporations could take federal help and still fire workers. Democrats also wanted strong restrictions on corporations who take federal help, but the source said the GOP bill included “very weak” stock buyback restrictions that could be waived by Mnuchin.

Sen. Jon Tester Jonathan (Jon) TesterPence seeks to boost Daines in critical Montana Senate race This World Suicide Prevention Day, let's recommit to protecting the lives of our veterans Filibuster fight looms if Democrats retake Senate MORE, a moderate Montana Democrat, said the negotiations "haven't been particularly bipartisan."

"It's not well thought out, it doesn't put the priorities with workers to begin with, there's too much money, there's no oversight — not too much money, [but] too much money that they can do whatever the hell they want with, and with no oversight whatsoever," he said.

The GOP bill, according to the source, also increases a “corporate bail out fund” to $500 billion. Senate Banking Committee Chairman Mike Crapo Michael (Mike) Dean CrapoBottom line Davis: The Hall of Shame for GOP senators who remain silent on Donald Trump Top GOP senator urges agencies to protect renters, banks amid coronavirus aid negotiations MORE (R-Idaho) had pushed to increase the $208 billion proposed in the original GOP plan to ensure distressed industries have access to capital.

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A Democratic aide confirmed the change, characterizing the bill as currently drafted as a “non-starter.”

"Right now people are very unhappy about the Republicans have put forward. ... The overall view is that they want to create a slush fund for giant corporations," Sen. Elizabeth Warren Elizabeth WarrenGOP set to release controversial Biden report Biden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt MORE (D-Mass.) told reporters after the lunch.

Sen. Ron Wyden Ronald (Ron) Lee WydenGOP set to release controversial Biden report Democrats fear Russia interference could spoil bid to retake Senate GOP senator blocks Schumer resolution aimed at Biden probe as tensions run high MORE (D-Ore.) said that the bill also walked back an understanding he had with Sen. Chuck Grassley Charles (Chuck) Ernest GrassleyGOP set to release controversial Biden report McConnell locks down key GOP votes in Supreme Court fight Senate Republicans face tough decision on replacing Ginsburg MORE (D-Ore.) on extending unemployment insurance.

"On unemployment insurance we've made a fair amount of headway," he said. "But based on what I've heard, what we had agreed to has now been kind of ratcheted down. So I'm kind of trying to figure out what the state of play is."

Van Hollen added that “some of the commitments that were made [to Democrats] … were pulled back."

Republicans have defended their process, noting they spent days behind closed doors negotiating with both the administration and Democrats.

GOP senators began drafting the bill even without an overall deal. But, they said that they included areas of bipartisan agreement where they existed and tried to draft the legislation in a way that could garner bipartisan support in areas there they didn't have a deal.

"What we intend to do here in the Senate is to move forward with the Senate bill. I'm hopeful and optimistic that we will get bipartisan support because this bill has been negotiated on a bipartisan basis," McConnell said during a press conference on Sunday.

Mike Lillis contributed.