

Even if he could, Musk would have to accept the pardon which involves admitting his guilt.
A pardon means punishment is waived. You have to be punished before a pardon applies, and you have to be found guilty before you can be punished. So the only way to avoid the trial is to plead guilty/no contest.
A pardon is not immunity, immunity means you cannot be tried so the question of guilt is forever left unanswered.
According to him, it frees him to vote his conscience since it relieves him of needing to suck party cock. Murkowsky has also been threatening to leave the GOP caucus.