While Iran’s march toward a nuclear bomb has provoked a major clash between the White House and Congress, Iran’s march toward conventional domination of the Arab world has been largely overlooked. In Washington, that is. The Arabs have noticed. And the pro-American ones, the Gulf Arabs in particular, are deeply worried. This week, Iranian-backed Houthi rebels seized control of the Yemeni government, heretofore pro-American. In September, they overran Sanaa, the capital. On Tuesday, they seized the presidential palace. On Thursday, they forced the president to resign. The Houthi have local religious grievances, being Shiites in a majority Sunni land. But...
