Yup, because nuclear power requires humongous government investment, so the party of small government is never going to go for it, while nuclear has a bad reputation both from a cost efficiency, lead time, and a safety point of view, so a progressive party is not likely to go for it when renewables are a much more attractive looking solution.
I thought you have a "fossil fuels are cool and manly" party and a "fossil fuels are important for corporate interests" party. But that's just my impression as an outsider.
I would have said "Renewables (but really mostly just fossil fuels) Party" but recent legislation makes it seem like the Democrats may be getting more serious on renewables.