Obama probably doesn't have the spare cash to go after MO in a serious way, even if it is a potential pickup.
It all depends on how things sit in October, my man. He may make a last minute run at it if the polls are close, like he did with Indiana in '08.
In 2008 he had more cash than his opponent so he could go after IN knowing that McCain couldn't. This time it is the other way around. Romney may throw some cash at MO just to defend it anyway. We have already seen Romney significantly outspend Obama in MI and PA, both of which are somewhat like MO but on the other side (not really swing states but could be).
States like AZ, MT, GA, MO are simply not going to be tipping point states. There is no scenario when one of those goes Obama but he still loses FL and OH. Therefore they are only luxuries he cant afford
