Earlier this week, Secretary of State John Kerry was in Saudi Arabia trying to reassure one of America’s most important Arab allies that the administration wasn’t selling them down the river. The Saudis, like many Arab regimes in the region, are actually in agreement with Israeli Prime Minister Benjamin Netanyahu about the nature of the nuclear threat from Iran and President Obama’s reckless pursuit of détente with that regime. But Kerry’s efforts to calm the Saudis didn’t appear to succeed. Despite the secretary’s claim that the U.S. wasn’t seeking a “grand deal” with Iran and would, “not take our eye off of Iran’s other destabilizing actions,” the Saudis were well aware of the fact that Iranian-supported Shiite troops were playing a leading role in the effort to reclaim the Iraqi city of Tikrit from ISIS. As the New York Times reports today in a front-page feature, in the wake of the president’s complete withdrawal from Iraq, Iran has virtually replaced the U.S. as the dominant foreign power in that country. In other words, it’s too late for Kerry or American allies to worry about whether Iran’s efforts to gain regional hegemony will succeed.