This is the REAL scenario that will unfold, based on recent turmoil in the Arab Spring uprisings (most modern example of revolutions).
1: Obama uses EO to usurp the power of the elected general assembly (Congress). All power is hereby vested in Congress...
2: The General Congress starts the impeachment process.
3: Obama disbands Congress (history is full of over 100+ legendary examples of executives becoming dictators by suspending/abolishing the popular assembly).
4: House and Senate Democrats obey Obama's order to disband. A handful of RHINOS give some lip service against Obama, but also obey his order.
5: A House and Senate being composed only of real conservatives (since the liberals left), votes to impeach and remove Obama.
6: Obama says their vote is illegitimate, since he disbanded them. Lots of "Constitution was written by rich white slaver owners" propaganda "Time for the Change I promised" and Constitution is disbanded.
7: Civil War erupts between liberals and conservatives. Oathkeepers and Oathbreakers start the confrontation. "Ex-Pro-Constitutional Law Enforcement" now branded as "traitors" vs "Current/Pro-Obama Law Enforcement."
8: The liberal masses hide in their houses and cheer on the mass death wrought upon the Pro-Constitution terrorists.
9: The armed pro-Constitution population joins Oathkeepers.
10: Foreign nations come in to "save America from the terrorists."
11: Many "current Pro-Obama" forces abandon Obama and help resist foreign invaders, realizing what fuckups they were.
Now, for speculation.
12: In desperation, pro-Constitution forces use nukes against foreign invaders. Launching only two or three. They hit small cities, sending a message to China and Russia to **** off and leave us alone.