name one (serious) potential republican nominee that could carry vermont?
Unless there is a re-alignment, Vermont will probably be the 46th-48th state that would likely go to a landslide winning GOP candidate. I'd say it's more likely Vermont would go to the Republicans than Mississippi would go to the Democrats, though. My personal belief is that the rate of Republican voters is growing at a rate greater than that of Democrats.
name one (serious) potential democrat nominee that could carry mississippi?
Take away welfare and subsidies to states and I bet Mississippi or even Alabama could quite possibly go to the Democrats. Mississippi is the poorest state in the nation---it has the lowest per capita income of any state in the union. It's pretty dry down there with jobs and oppurtunity being limited the way they are. Still, I don't see a whole lot changing any time soon.