Oh come on! What’s the worst that could happen? Try this on for size.
President Trump, despite his many personality flaws, turns out to be a great president and really does make America great again (No, I don’t believe it will happen!), causing cognitive dissonance to reach lethal levels in the blue states. (Insert whatever consequences you can imaging from this scenario, and then quickly reach for your drug of choice to calm your heart.)
I realize nuclear war is a much more likely disaster, but as long as you are talking about the WORST that could happen, we have to consider the low-probability options as well.