Lev Parnas's attorney penned a letter to 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.) Friday detailing what his testimony would add to the impeachment trial of President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE, even as the Senate appears prepared to vote down bringing in new witnesses.

In the letter, Joseph Bondy tells McConnell that Parnas, an indicted associate of Trump's personal lawyer Rudy Giuliani Rudy GiulianiDemocrats fear Russia interference could spoil bid to retake Senate Grand jury adds additional counts against Giuliani associates Lev Parnas and and Igor Fruman Juan Williams: Breaking down the debates MORE, would be able to tell the Senate information that is "directly relevant to the President's impeachment inquiry," specifically regarding Parnas's relationship with Trump and Giuliani as well as his "actions in Ukraine on behalf of the President, as directed by Mr. Giuliani."

The three-page correspondence goes into detail about Parnas's actions in Ukraine as well as those who were privy to what he was doing.

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The contents are similar to what Parnas said in his sit-down interview with MSNBC's Rachel Maddow Rachel Anne MaddowMichael Cohen: Trump hates Obama because he's everything he 'wants to be' The Hill's 12:30 Report - Presented by Facebook - Trump floats 0M+ in personal spending for reelection bid Feehery: Unconventionally debunking the latest political conventional wisdom MORE two weeks ago. Both the letter and interview indicate that Secretary of State Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE, former Energy Secretary Rick Perry Rick PerryOVERNIGHT ENERGY: Democrats push resolution to battle climate change, sluggish economy and racial injustice | Senators reach compromise on greenhouse gas amendment stalling energy bill | Trump courts Florida voters with offshore drilling moratorium OVERNIGHT ENERGY: Trump signs major conservation bill into law | Senate votes to confirm Energy's No. 2 official | Trump Jr. expresses opposition to Pebble Mine project Senate votes to confirm Energy's No. 2 official MORE and several other officials within the Trump administration were aware of the pressure campaign in Ukraine that is at the center of Trump's impeachment.

The White House and Giuliani have both tried to distance themselves from Parnas, with Trump repeatedly saying that he doesn't personally know Parnas and has only ever interacted with him at fundraising events. However, the letter doubles down on Parnas's claim that he was taking direct orders from Giuliani, who was working on behalf of his client, the president.

Trump's defenders are dubious of Parnas's credibility, as he and Igor Fruman, another associate of Giuliani's, were arrested late last year on campaign finance charges.

Senate Minority Leader Charles Schumer Chuck SchumerRepublican senator says plans to confirm justice before election 'completely consistent with the precedent' Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral Graham signals support for confirming a Supreme Court nominee this year MORE (D-N.Y.) invited Parnas to attend the impeachment trial earlier in the week, but because of his electronic ankle-monitor, Parnas was not allowed inside the Senate chamber.

Below is the letter Stephanie Schuman @LeafLegal and I sent to Senator McConnell earlier today, (202) 224-2541, summarizing the testimony Lev Parnas would be able to provide, were he called as a witness. #LetLevSpeak #AmericansDemandWitnesses #CallTheWitnesses #LetBoltonTestify pic.twitter.com/WPn7ppz2rG — Joseph A. Bondy (@josephabondy) January 31, 2020

Bondy tweeted the letter Friday afternoon amid what could be the final day of Trump's trial.

Both the Democratic House managers and Trump's defense team have finished their opening arguments, and the two-day questioning period for senators ended Thursday. A vote on whether to admit more evidence and witnesses in the trial is expected later Friday, but it's believed that Democrats don't have the four GOP votes needed for the motion to pass.