With a bold modernization project, Saudi Arabia is embarking on reforms U.S. policymakers have been urging for decades. The crown prince’s recent crackdown could undermine this crucial effort.

The reelection of Iran’s Hassan Rouhani, as well as U.S. President Donald J. Trump’s strong affirmation of ties with Sunni Arab states, sets the stage for an intense new round of competition in the M…

The latest recurrence of domestic protests in Iran stems from the country’s role in regional wars, combined with corruption and economic mismanagement. This discontent is likely to continue to pose a…