Personally, I'd like to see him charged
I would too but rude behavior is seldom against the law.
If there were glaring tax issues the IRS would have already charged him. The government has his tax records, they've had them all along.
Mueller went through his sh*t with a fine tooth comb. Raided his attorneys office, waterboarded an old general or two...nuthin'...nada...zip.
Everybody and his brother has been looking where they shouldn't be looking for something that could end this madness.
It's probably a billion dollar industry at this point.