People regularly vote because "gas went up". It's not just Republicans. Unfortunately the party that says "climate change is a hoax and you don't have to change" is always going to win over the one that says "we have to conserve and you have to live less luxuriously in order for us to make it."

I live in a liberal area. Hardly any Trump voters here. Getting people to drive slightly less or even allowing a bike lane to allow other people to drive slightly less is viewed as the apocalypse.