I doubt it will play a major role, so much as it will play a minor annoyance by election day. With a week to go I’m quite confident that all the areas effected will have their clean up jobs well underway, and far enough along to not impede voting next Tuesday.
This could effect early voter turnout. But most of the states hit by the storm are firmly in Obama’s camp to begin with. The only two where I would even think that to be an issue would be my Ohio and neighboring Pennsylvania. Here in Ohio I heard on the radio today that my county (Franklin) will still hold early voting today, and we’re in the middle of the state. So if it’s impeded anywhere more drastically I would expect it’s the south east of the state (near West Virginia, where the bad snow is). The area leans heavily Republican. Across Pennsylvania there is crappy weather…. but in all I don’t think it will really matter.