Here are the three key facts from the notorious Steele Dossier that Robert Mueller just confirmed

The Steele Dossier is arguably the most controversial document in recent American history.

The bombshell document was first published by BuzzFeed News in January 2017, and included lurid allegations about President Donald Trump's sexual proclivities along with details of more banal financial crimes.

The dossier is the subject of rage from Republicans who write it off as a partisan political document and scorn by leftists like journalist Glenn Greenwald, who dismissed it as "farcical".

But Washington Post columnist Dana Milbank has identified three key facts from the dossier that special counsel Robert Mueller has now corroborated.

"White House press secretary Sarah Sanders said the latest filings 'tell us nothing of value that wasn’t already known,'" he wrote. "That’s true in the sense that recent findings essentially corroborate much of the 2016 'dossier' by former spy Christopher Steele."

Specifically, Milbank points out that Mueller's findings echo the dossier’s allegation that Trump's former personal lawyer Michael Cohen had an “ongoing secret liaison relationship” with the Kremlin, including working to build a Trump Tower in Moscow into the middle of 2016 and lying about it.

But it's not just that, Milbank writes.

"The new revelations about Cohen also show that the dossier correctly identified Putin lieutenants Dmitry Peskov and Sergei Ivanov as the ones managing the Trump campaign for the Russian government," he says.

Peskov, who is now the Press Secretary for Russian dictator Vladimir Putin, has only recently admitted to his deep ties to Cohen.

The dossier said that in August 2016 Peskov was "scared sh*tless" about the hacking of the DNC being exposed and blamed on him.

Ivanov was a rival to Peskov, also a former KGB agent, and was fired in August 2016.

As Milbank writes, five former Trump aides have now pleaded guilty in Mueller’s Russia probe, and many now see it as "perfectly plausible that Trump himself, as former aide Sam Nunberg put it, 'may very well have done something during the election with the Russians.'”

Read the column here.