President Donald Trump’s admission last week that Iran had refused to abandon uranium enrichment—even after U.S.–Israeli strikes in June—exposes the harsh reality of Mideast power politics. Israel’s Prime Minister Benjamin Netanyahu visited Washington on Monday, ostensibly to discuss Gaza, but, according to a well-informed Israeli journalist, with the next steps on Iran topping his actual agenda. Trump now faces a pivotal choice: statesmanship in pursuit of U.S. interests or subservience to Israel’s radical government. The recent strikes were meant to cripple Iran’s nuclear ambitions. Instead, they proved the limits of coercion. Satellite imagery shows Iran rebuilding its bombed Fordow facility,...