Since 2004, the United States has explicitly, repeatedly and passionately singled out Lebanon as an arena where Hezbollah and other regional Islamist forces backed by Iran and Syria would be faced down and defeated. But now the United States will face these forces from across the same cabinet room table, not as bludgeoned and defeated foes, but rather as partners and colleagues in Lebanon’s national unity government. When Hezbollah and its erstwhile foes exchange kisses, a befuddled Condoleezza Rice should take care not to fall off her exercise bicycle.