Nice theory but rarely done in fact.
It will be a natural progression of pressure with NATO involved.
The Dems have already committed to being tough guys regards Iran and they can't afford another spineless episode in the foreign policy area.
In Foreign policy, the Democrats have the credibility problem.
Ironically, the Iranian situation gives the Dems a chance to shine their sabers for full effect and reap electoral benefits.
What makes you confident that NATO will be anxious for a military intervention?
What makes you think Dubya has the credibility to lead NATO in the direction you describe?
Like I heard somewhere, nice theory but rarely done in fact.