I seriously doubt if Mueller will find much on Trump personally. Especially anything indictable
Any leader involved in questionable activities knows not to get personally involved but to let underlings make the actual contacts. I suspect Trump has maintained plausible deniability
What will happen is that Flynn, Manafort, Kushner and Lil' Donnie will be up to their armpits in questionable contacts with the Russians and failure to report those contacts. Unless they cop a plea and reveal what Trump knew, Trump will get out of this with just the humiliation of an election victory tainted by Russian interference
Presidential pardons to follow
I fully agree......Trump himself will neither be indicted nor ever impeached...and actually, no decent "spy" would have ever trusted an orange buffoon to pull off any decent subterfuge.
Most likely,however, is a Trump resignation, urged on by republicans who see the Trump "brand" as a liability to their own sorry asses.
No doubt in my mind that Mueller's investigation will divulge a whole bunch of ethical, questionable behaviors along the lines of emolument breaches and financial misdeeds....not along the lines of outright criminality but very unsavory behaviors.
Slice it any way your biases dictate, but if Trump and his followers thought that his would be an outstanding administration, that estimation is only agreed upon by morons.