If that were to come to pass, I guarantee 0bama would be thrown out of office and Iran turned into a glass bowl.
The Iranians haven't thought this out very far ~ which is one of the problems of using too much dope.
With most electrical systems in the USA fried by the EMP, getting food & water will be impossible for most people. Stores & banks will be closed for weeks or months; debit & credit cards will be useless. Even cash might not pay for what you need, even if you could find someone willing to sell it to you.
An EMP attack will make Katrina look like Thanksgiving, only it will encompass much of the USA. There will be few working vehicles, so no significant relief effort can be made by the gov't.
The police will be as helpless as the citizens. Their cars, phones, & radios will not work either. Anyone who cannot defend & sustain themselves for weeks or months will likely die in the resulting chaos.
Probably the only people who will survive in relative comfort & security will be Obama & his friends.