Senate Democrats on Friday ripped Republicans for making last-minute handwritten changes to a version of their tax-reform legislation mere hours before the chamber is expected to vote on it. 

"They are scribbling changes in the margins. What could possibly go wrong," Sen. Brian SchatzBrian Emanuel SchatzOvernight Tech: AT&T chief takes the stand to defend merger | Facebook keeps most users out of EU data law's reach | HUD reopens probe into Facebook housing ads | Venture capital firms go to bat for cryptocurrencies Facebook investigated over alleged housing discrimination Senate confirms Trump’s pick to lead NASA MORE (D-Hawaii) tweeted, with a photo showing a column of scribbled notes next to a section of the lengthy bill.

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The version of the bill Democrats are criticizing does not include a final GOP amendment that hasn't been filed yet.

"Trying to review the #GOPTaxScam but they are making hand-written changes to brand new text as we speak – can anyone else read this?" tweeted Sen. Dick DurbinRichard (Dick) Joseph DurbinHannity, Kimmel, Farrow among Time's '100 Most Influential' The Hill's Morning Report: 200 Days to the Election Dems walk tightrope on Pompeo nomination MORE (D-Ill.), sharing the same page of the law.

Durbin also criticized the process on the Senate floor, saying the GOP wrote out the bill "in longhand" and provided an illegible "work product" to lobbyists before handing it over to the senators voting on it.

 

Multiple senators criticized the GOP for making handwritten changes, including Sens. Bob CaseyRobert (Bob) Patrick CaseyNow is the time to modernize the OTC monograph system Dems walk tightrope on Pompeo nomination Overnight Energy: Trump NASA pick advances after drama | White House office to investigate Pruitt's soundproof booth | 170 lawmakers call for Pruitt to resign MORE Jr. (D-Pa.), Bob MenendezRobert (Bob) MenendezPoll: Menendez has 17-point lead over GOP challenger Russian attacks on America require bipartisan response from Congress Justice Dept intends to re-try Menendez in corruption case MORE (D-N.J.) and Jon TesterJonathan (Jon) TesterFlynn to campaign for Montana GOP Senate candidate Trump VA pick faces challenge to convince senators he’s ready for job Overnight Defense: House to begin work on defense policy bill | Panel to vote Monday on Pompeo | Trump to deliver Naval Academy commencement speech | Trump appeals decision blocking suspected combatant's transfer MORE (D-Mon.). House Minority Leader Nancy PelosiNancy Patricia D'Alesandro PelosiA warning to Ryan’s successor: The Speakership is no cakewalk Race for Republican Speaker rare chance to unify party for election The Hill's Morning Report: Inside the Comey memos MORE (D-Calif.) also joined the criticism.

The Senate is expected to vote on the sweeping legislation late Friday, following a day of negotiations among Republicans, almost all of whom need to vote for the bill for it to pass.

The legislation, if passed, would be the largest tax reform in the U.S. in three decades, marking a historic victory for the Republican Congress and the Trump administration.