I truly believe that evangelicals have lost sight of their mission. According to the N.T., their mission is to spread the gospel and make as many converts as they can. Their mission is NOT to try to legislate their beliefs via political activity. Consider what their misguided efforts politically has already done and will continue to do in regards to their TRUE mission:
1) In conflating their religion with far-right politics, they have alienated at least half of the population. That's 50% of potential converts lost.
2) In supporting Trump, who is the polar opposite of everything Jesus stands for, they have alienated EVERYBODY outside of their evangelical bubble. There go countless other potential converts!
3) The more political power they acquire, the more we will see that, once in power, they will prove to be every bit as corrupt as any non-Christian politician. Consider Mike Pence, who lies constantly to excuse, deny, or cover-up Trump's insane behavior. He acts like a total groveling sycophant and treats Trump as one would treat a king. Believe me, potential converts notice this kind of thing.
I am hopeful that, years from now, evangelicals will finally realize the error of their decades-long push for political power, at the expense of the Great Commission, and they will finally hit their knees in sackcloth and ashes. Too bad they are too short-sighted to see this now. I mean, the signs are all there, and everybody else sees it, but they are too consumed with their lust for power to notice the obvious.
But then again, evangelicals love to believe that they are being persecuted, and any backlash that results from their own misguided values will probably be dismissed with their typical whiny "we're being persecuted" bullshit. They are making themselves pariahs, but they are too busy pointing the finger at others to recognize that they did to themselves.