[gunsle]

There is no where near 100m American evangelicals. There’s less than 60m almost certainly. It doesn’t account for everything.

[AnimalMuppet]

I've seen estimates that 6% of America is evangelical. (Source: my memory.) Note that the estimate comes from an evangelical, who is drawing the lines at what an evangelical considers evangelical; that may not correspond with where others think the lines should be drawn.

But accepting that number, 6% x 340 million people = 20.4 million evangelicals.