The US defends its allies
Asked on February 1, 2006 whether the United States would protect Israel militarily against Iran, President George W. Bush left no doubt: “You bet, we’ll defend Israel.”
…On certain issues, US policy is remarkably consistent and bipartisan. No matter how poisonous political battles are in Washington, Congress unites in the face of aggression against the United States or its allies. Bush’s pledge to protect Israel is neither unique nor counter to US interests. For Tehran or any other state to believe otherwise or engage in policies that would challenge the White House on its fundamental duties to its allies would represent a serious miscalculation.