The more I think about it, the less I support doing anything to Iran. If they actually attack Israel than I'd support defending them, but otherwise, if Israel feels threatened and wants to attack first, that is their, not our, business. As for Afghanistan, we should have declared war on them, but it should have been Congress and not the President, and we need to get the heck out now. If we can't win in 10 years, its not worth doing
Regarding drugs, I have a bigger problem with the whole "War on drugs" than I do with simply banning drugs. The Federal drug war hasn't been helping rehabilitate drug users but instead has served as an excuse to get 3 million of our people locked up. If a state wants to ban drugs they should be allowed to do that, although I think the current consequences are a a violation of the eighth amendment. I don't think it makes a whole lot of logical sense to ban weed though. Alcohol is presumably worse.