Would you as the U.K, Australia, Japan or any of our allies commit you blood and treasure to an American-led war knowing we would pull the plug as soon as the polls change? Would you as Al Qaida, the Taliban, Syria, North Korea, Hamas, Hizbollah or any of our enemies ever give up? All you have to do is hang on until the American media comes to your rescue.
Your scenario is EXACTLY what happened in Vietnam. Halfway through this article, the real traitor is revealed.
http://www.geocities.com/Pentagon/Camp/7624/Generals/giap.htm