Trump is being indicted for his attempt to overturn the election with fake electors, and disrupting the certification of the election, not for questioning the results. Al Gore questioned the results, but conceded when he lost in court.
When Trump lost in court, he tried to submit fake electors and have the real electors votes overturned. He tried to bully Secretaries of State into decertifying their results, through threats and intimmidation.
You don't seem to understand what RICO means. It means a group of criminals, all working on the same crime enterprise together, even though they're handling different aspects of the criminal enterprises.