For the next 72 hours, these riots will spread and escalate in intensity. Billions of dollars worth of property damage will occur and thousands of lives will be lost, most of them racially motivated even though the victims will most likely share the same political philosophy as the attacker.
After three days, once the rioting has spread to enough urban centers, Obama will declare a "national state of emergency", invoking multiple executive orders and declaring martial law.
This will enable him to remain as sitting president until a time when he sees fit.
And that is when the real fun begins.
Get your preps ASAP kiddies! You have less than a week!