Take it with a grain of salt because it’s from a Forbes contributor. Tim Worstall:
One of the great conundrums of the American political scene is why the poorer states, colloquially known as “red” states, tend to vote Republican or conservative, while the richer states, the “blue” ones (and let it be said that this is very confusing for this European, for over here the colours tend to work the other way around, red is Labour, or left wing) tend to vote Democrat.
In Europe, where Worstall is from, such voting tends to be the opposite. But why?
The red states aren’t actually poorer in terms of the way people live.
There’s more money in blue states, but a lower cost of living in red states.