It's a Soviet-style investigation, M E M. Where from before Trump was even inaugurated, the Democrats (and their loyal Bolshevik collaborators in the liberal media) were publicly stating and openly salivating about finding a way to impeach Trump.

Sean Hannity frequently shows a montage (I think sourced from the Media Research Center) where every single month since Trump's Nov 2016 election the liberal media has leaped on this or that as the latest silver bullet that would lead to Trump's impeachment.

It is a case of manufacturing the crime to destroy the man, not an investigation of the true facts.