He can't pardon himself from the State charges. He can however create a Constitutional Crisis for 4 years where nobody is quite sure if they can prosecute or jail him or not.
They don't mean anything if he loses either. I don't think Democrates will let Trump not be a Republican nominee, it would be harder for them to win elections if they have someone more sane as competition. This is why Hilary's campaign supported Trump and why Trump is there in the first place, so they can win more easily.
All this extremist bigoted pro-gun anti-education right wing bs is spreading to countries like Australia too. He has made idiots proud to be idiots, and encouraged them to be anti-science