And how will he accomplish that? Airstrikes? What that will leave is a pissed off and maybe nuke neutered Iran to his successor. We couldn't neutralize Saddam with airstrikes alone. We chouldn't drive al Qaida and the Taliban out of Afganistan with airstrikes alone. We can't guarantee a nuke-free Iran with airstrikes alone. It will take troops on the ground to do that, and we're fresh out.
Can't envision anything more than an air strike on a “nuke” facility. Even that is probably sketchy given the friendly tone in DC.