How far could Obama spread it? Try from sea to shining sea. It wouldn’t just be the army, it would be all the armed forces, with the possible exception of the USNG and some veteran militias. Some would defect, but many of your own state’s citizenry would rise up against you to support the Feds. He has everybody from FEMA to the EPA and Homeland security armed to the teeth. He has the power to shut down communications, transportation, etc. And he would! Even though I believe it wouldn’t succeed, I would be fighting too. I’m just too pragmatic a person to believe the states can successfully break from the iron grip of the ObamaNation.
It could be nasty.