According to The Hill, former Trump campaign adviser George Papadopoulos and his fondness for excessive libations may have been the reason the investigation into collusion with Russia was started in the first place. Papadopoulos reportedly couldn't keep the the beans to himself when it came to opposition research into Hillary Clinton -- and boy did he spill them in a big way.
As The Hill, and other outlets like the New York Times, report, the Russian inquiry began after Papadopoulos imbibed in a "night of heavy drinking" at a Posh London bar and told "Australia’s top diplomat in Britain" that Russia was holding onto damning information about Clinton, who Trump ran against in the 2016 presidential election. According to Papadopoulos, Moscow was in possession of "thousands of emails" that supposedly implicated Clinton in a variety of crimes.
This was reportedly all it took to launch Robert Mueller's investigation. But, remember, Trump only works with the VERY BEST people. Also keep in mind, Papadopoulos, now a cooperating witness in the investigation, already pleaded guilty to lying to the FBI. If this guy is "the best" we can't even begin to imagine how inept the worst people would be.
We thank dog for arrogant, not-so-smart advisers, though!