This could play out in one of two ways.
1. The Iraq model...we do a preemptive strike, then everyone acts like it was unprovoked.
2. The 9/11 model…Iran uses a nuke, then libs (and the world) ask why Bush didn’t prevent it.
Exactly.
And if we pull a Kerry and wait until attacked, what good is our "measured response" to the innocent citizens of (name your Israeli or US city here)?