The rapture of the Church The Body of Christ is what starts it. Once we are gone, there will be nothing holding back tetribulation.
If conservative American Christians all suddenly disappeared, there would only be pro-gay, pro-abortion, and in fact, pro-open-border, pro-U.N. “christians” (small “c” on purpose) and unbelievers left in America.
In that case, I believe what’s left of America would fold rather quickly into being just another United Nations “state”.
I won’t say that’s exactly HOW it will happen. I’m just throwing it out there.