If Trump pardoned Hunter Biden and the stuff on his laptop was as bad as it was claimed, the lefties would figure out a way to say he was harboring child traffickers and pedophiles. There is no winning with them, except for actually winning.
On the other hand, what if Biden wins election and is now in a position to pardon his son. Will they impeach Biden for that? (rhetorical question)
Trump could pardon any of his children if they were convicted before the next Oath of Office is taken by Trump or Biden. Or should Trump win, could pardon in the next term.