No way. Russia and China are still milking wealth out of the United States faster than a country girl on a dairy cow. When the dollar crashes, a possible threat from those countries may be a different story.
The Congressional Budget.
Seriously, infinity is not a concept that sits well in my rational processes either. Even the universe has finite mass. I remember being introduced to parabolic limits in calculus and thinking, "bull@#$%." Yet people a whole lot smarter than me say its so. I still...
I give the odds of 40/60 attack/no attack. If there is an attack, I would expect it OCONUS. A soft or light target.
ISIS is not new, they are the bastard children of al Queda.
To affect the majority of CONUS with EMP would require very few low-yield nuclear weapons detonated at strategic...