Wendy Sherman actually said...

We have made it clear to Iran that, if it fails to live up to its commitments, or if we are unable to reach agreement on a comprehensive sol...

If Iran lives up to its commitments, then the world will become a safer place.

Moving forward on new sanctions now would derail the promising diplomacy I have just outlined.

If we, in fact, do not give negotiations a chance, they have less of an incentive to stay onboard.