If Trump decides to get nasty, there's plenty of meat on this bone for him to gnaw on. Here we have actual documented evidence, and evidence that was clearly hidden from public view of political chicanery high up in the FBI. Can't have that in a republic.
If the FBI is this corrupt, what about the DOJ, NSA, CIA, IRS, EPA, etc.? I suspect there are so many remnants that are anti Trump that it is causing huge problems. Yes, I know this is called the "Deep State", I just call it corruption. The Bureaucracy is very, very powerful in D.C. Their only interest is to sustain themselves, and grow. They spend their budgets even it they don't need to, in order to get more next year. They have no incentive to contain costs.