I am supporting Cobra Commander for president for now. With one phone call, he can end worldwide terrorism. With another phone call, he will get gas prices down to a buck a gallon. With one phone call he will end the recession. With a fourth phone call the drug problem in the US will disappear. With his fifth phone call the nation's debt problems will disappear.
Only once, actually. Whitcomb's bomb WAS picked up by Covenant forces, and when that Covenant taskfoce orbited Onyx, some Engineers managed to detonate it. The second time I don't believe atucally happened- Cortana or some AI had discovered another Halo and reccomended a Nova Bomb.
Still trying to think of what my favorite Halo quote is, though.