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Our diplomacy is at work with respect to Iran, where, for the first time in a decade, we’ve halted the progress of its nuclear program and reduced its stockpile of nuclear material.  Between now and this spring, we have a chance to negotiate a comprehensive agreement that prevents a nuclear-armed Iran, secures America and our allies -- including Israel, while avoiding yet another Middle East conflict.  There are no guarantees that negotiations will succeed, and I keep all options on the table to prevent a nuclear Iran.
 
But new sanctions passed by this Congress, at this moment in time, will all but guarantee that diplomacy fails -- alienating America from its allies; making it harder to maintain sanctions; and ensuring that Iran starts up its nuclear program again.  It doesn’t make sense.  And that's why I will veto any new sanctions bill that threatens to undo this progress.  (Applause.)  The American people expect us only to go to war as a last resort, and I intend to stay true to that wisdom.

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