… was not Democrats refusing to accept election results. Thats a talking point by republicans trying to downplay Jan 6 and the false electors plot, not actual fact.
Mueller’s findings were not exactly a ringing exoneration despite how the right likes to frame it. A lot of people went to jail and he specifically said that he couldn’t exonerate and only stopped the investigation due to DoJ policy, and noted that congress could continue.
I mean... what's undoubtedly true is that Trump actively called for foreign intelligence services to attack his political adversary, and then they did that with the express goal of helping Trump win.
The fact that Mueller couldn't prove beyond a reasonable doubt that a specific deal had been made is pretty much immaterial.