In my book when you are presenting a well-prepared argument and use crappy evidence you're basically admitting you don't have good evidence. Keeping attacking the son says you don't actually have any dirt on the father.
If you require your president only to be not criminal then your standards are pretty low I must say.
Having said that, Biden the POTUS is 100% criminal, there can't be any doubt about that, War Criminal that is.
As for the rest, it needs to be investigated but I highly doubt he was not involved in these schemes.