I think that would imply Mueller has a vendetta against Mr Trump. I do not think that is who Mueller is.
My prediction: Mr Trump was an unwitting dupe of Russia meddling. The Russians knew he could be easily manipulated (they knew he was a narcissist). No crime if one is oblivious to reality. Just a lot of questions why he would continue to make policies which benefit the Russians, the N. Koreans, the Israelis i.e. is narcissism on display? then Mr Trump is a danger to America.
See PBS' Frontline
from March 22, 2019.
No way was Trump an unwitting fool.