There's nothing they won't pretend and they'll just jump to the next biggest stretch when each plausibly reasonable response is exhausted and when there's nothing reasonable left they'll be just as happy to abandon reason.
In this case there's even a reasonablish riposte in as much as the amount of trouble he seems to be getting in is pretty limited, which may or may not be because it's the appropriate thing to happen in light of the facts or might be the result of who his father is. If you are committed to the idea that prosecution of Trump is bad whether it's just or unjust simply because you will always support Trump then it makes sense that the best reply to a recent instance of justice extending even to a presidential relation proving that there is not double standard would be to say that that this was tokenistic because of how minor the consequences.