The Evangelicals sold their souls to gain power.

[Mike 03]

6. You are right about them selling their souls.

But the Christian Nationalism problem will persist because they have amassed significant power and are well funded, even as the number of followers drops. They put immense pressure on their congregants to vote, even to the degree that they embarrass the ones who don't vote. Two books I absolutely recommend for anyone interested in this:

Katherine Stewart, The Power Worshippers
Sarah Posner, Unholy