That is why you are seeing some states like Michigan, Wisconsin showing signs of Red and states like Virginia, North Carolina and others showing signs of Blue. People moving from one state to another change the political landscape. I think the reason people move from the North to the South is weather more than taxes. The Northern states tend to have older people and they end up wanting to retire down south.
We have all these NJ nitwits moving to Wilmington NC screwing up the city, county and state.