I see what's happening in other countries, and even continents like Australia as a glimpse into the long-term future of the US. Our country was founded on liberty; so we'll probably be one of the last holdouts.

Then it will be competing factions which share the same culture of "me first" and "my ancestors built everything good ever" fighting for what's left. My money is on Islam becoming dominant because it is a religion of conquest-at-all-costs and because the book of Revelation cites that those who do not worship the Antichrist will have their heads cut off, which is a common punishment.