As of December 2nd, 2017:
Paul Manafort: The ex-campaign manager to the Trump campaign got himself into some hot water because of what he did back in 2014 with Ukraine. That was two years before the election cycle and had absolutely nothing to do with Trump’s campaign. This was uncovered from the Mueller investigation – the investigation aimed at finding evidence that Trump colluded with Russia to rig the 2016 election.
Michael Flynn: He admittedly lied to the FBI about conversations he had with the Russian ambassador back in December 2016. Well December 2016 was AFTER the elections. This was also uncovered from the Mueller investigation.
So far it seems like the Mueller investigation is doing some work with catching the illegal acts committed by people in congress and connected with Trump – yet none of them appear to have anything at all to do with the alleged collusion between Trump and Russia to rig the 2016 election.
We will keep you posted.