I think the GOPe just did what they do to everyone who isn’t a cultist like they are, and Trump is just looking to turn it to his advantage since he has the means to do so.
He wouldn’t bother them if he won by their “rules” (which for some reason they consider sacrosanct), but since that didn’t happen he is pointing out (gleefully) that their “rules” are themselves a violation of a much more widely held set of rules.
Nice one.