When I was 20ish, I drove a vehicle maybe 2-3 times when I had had too much to drink, mostly due to ...well, youth and inexperience. I soon learned NOT to, and perhaps GW has too...we DO know that if he is elected, he will have drivers. In any case, DUI by itself is not a BIG deal.

If he had continued 'problems' with controlled substances, this tells me something about a general personality trait that bothers me, even if he seems to have it mostly under control.