No it doesn’t. An EMP attack would be a waste of a perfectly good nuclear device.
Read “One Second After” by William R. Forstchen for a good description of the consequences of an EMP attack.
No one knows how good an EMP attack would be—would it black out the nation—or just part of it? Would it cause collapse or just make America vindictive. In any case—subs at sea would launch a counter-strike on any nation that attacked us—or where the bomb came from. Any nation would ceast to exist, becoming a place of ruines, death and radiation. No rational people want to die—so an attack might not be coming. Even if Iran gets the bomb—will they hit Israel—and face obliteration?