Ironically, the reported goals of the 2016 Russian meddling was to sow discord in US politics, which those on the Left are gladly furthering, probably to the point that their behavior is resulting in much greater discord than Russia could have even hoped for.
I would not be surprised to Mueller (and his team) leak additional information and/or indict additional people just before the midterms, although many on the right are already calling Mueller's actions as political. For example, RealClearPolitics has called out the fact that the recent indictments
left out hacking attempts by the Russians on Republicans, and Andrew McCarthy of NationalReview, called out the indictments as
"nakedly politicized law enforcement", as those indicted should not be presumed innocent, and will never see the inside of a US courtroom.
Also of interest, Rod Rosenstein is in the process of getting impeached, although Identity Politics, and the number of Democrats in the Senate will prevent him from being found guilty in Congress. I personally think a contempt of congress charge would be more appropriate that is enforced by the House, rather than an impeachment.