Newsbusters picked up on an interview of General David Petraeus on Hardball. When asked about Senator Obama's 16 month plan for troop withdrawal, General Patraeus answered (in part) "It depends on the conditions; it depends on the mission set. It depends on the enemy. The enemy does get a vote and is sometimes an independent variable."
Subtle, yet effective. General Petraeus understands there is an enemy that must be defeated. Senator Obama has simply decided to take the enemy out of his equation.