Indicted Rudy Giuliani associate Lev Parnas has already publicly documented how deeply enmeshed he was in Donald Trump's world and now, in a letter sent by his lawyer to Senate Majority Leader Mitch McConnell Friday, he is outlining exactly what he would testify to if given the opportunity. Spoiler alert: It would be absolutely disastrous for Trump.

If allowed to testify, the letter asserts that Parnas would detail Trump's entire Ukraine conspiracy front to back, with receipts, while implicating multiple high-level Trump officials in the process. "If Lev Parnas was called as a witness, he would provide testimony based upon personal knowledge, corroborated by physical evidence including text messages, phone records, documentary evidence, and travel records, which is directly relevant to the President's impeachment inquiry," writes Parnas attorney Joseph Bondy.

Bondy says Parnas will reveal the "genesis" of the relationship between Trump and Rudy Giuliani along with all the GOP operatives who assisted in the effort to remove Ambassador to Ukraine Marie Yovanovitch and gather "dirt" on the Bidens. 

"Those holding various roles in the plot included GOP Super PAC America First, President Trump, Vice President Pence, former Energy Secretary Rick Perry, Secretary of State Mike Pompeo, Attorney General Bill Barr, Senator Lindsey Graham, Congressman Devin Nunes, Nunes's Staffer Derek Harvey, Journalist John Solomon, Attorneys Joe diGenova and Victoria Toensing, Mr. Giuliani, and others," Bondy writes. Yowzer. That's quite a list. Sen. Graham, eh? That would sure explain a lot. 

Bondy promises that Parnas will illuminate the "thousands of micro-steps" he took to lay the groundwork for the plan, including multiple trips to Ukraine in order to meet with top Ukrainian officials and "directly convey the President's 'quid pro quo.'"

In short, Parnas is offering to give congressional investigators a treasure trove of information. Sure, Parnas comes to the table with a tarnished reputation. But he has the exact profile of a witness that prosecutors use to build criminal cases all the time. Even better, he appears to have documented nearly everything and has somehow managed to finally get control of all his materials and evidence. 

As former federal prosecutor Joyce Vance tweeted, "If his testimony is corroborated by John Bolton, something that his lawyer’s letter suggests but that we won’t know for certain unless they both testify, then Trump is in deep trouble, even if the Senate whitewashes this."