Based on my personal experience traveling, there's a more practical reason for the political divide.
I spend a good portion of my life in rural parts of the US these days, where most of the residents are pretty conservative. But these are also parts of the country where I get nervous when I'm on 1/4 tank of gas. If you're routinely out in places where the nearest gas station might be > 50 miles away, you also see a dip in e-vehicles for very practical reasons.
When I'm at home in a city, it makes perfect sense to own an e-vehicle: typically I'm only driving a few miles a day, and the car spends most of it's time at my house or in a parking garage. When I'm out on business, and driving across hundreds of miles of barely inhabited land, I cannot imagine the stress of having an electric truck. It's not just about being 50 miles from a gas station, it's about the time it takes to charge on top of that.
In rural parts of the country, especially when you're out working, you can easily be putting on mileage combined with being far enough away from a charger that it just doesn't make sense to have an e-vehicle.