Trying to head off and mitigate any actual future findings, imho. Note that this is still the Obama administration Justice Department.
I am predicting rats will be jumping off the docks. This is necessary and will be brutal. I see Machiavelli here very clearly. You need to be warned so you can look away.
This is not an honest investigation but a political move to keep the idea alive that Trump was not elected fairly. It will not stop.