I doubt that it would happen just because a "white black man" loses the election. I guess it could possibly be a minor trigger, but if there is civil unrest, I suspect that it will be due to a combination of many other things: losing your job due to the economy, not being able to afford a tank of gas because our dollar isn't worth much anymore, not being able to afford to buy enough food, not being able to afford to buy medicine AND food, having to see your family living in your car or under a bridge, etc.
Terrorists (even local ones) are just terrorists. If they don't have one excuse, they will use another, even if they have to fabricate it. Angry, frustrated (otherwise fairly normal) people join the melee. The news media feeds it.
Anyone who has been reading these forums (or anything similar) should know by now that Preparedness is being prepared for ANYTHING. Have some food and water, some gear, and a prepared mindset that you can roll with the punches.
America is reeling from a lot of problems, due to multiple causes. Do what you can with what you've got, and get ready to jump in any direction.
Sue