In Turbulent Times, Xi Builds a Security Fortress for China, and Himself

Over informal, private meals with American leaders, China’s Xi Jinping let his guard down a little. It was a decade ago, relations were less strained, and Mr. Xi, still cementing his power, hinted he worried about the Chinese Communist Party’s grip.

Speaking privately with President Barack Obama and Vice President Joe Biden, Mr. Xi suggested that China was a target of “color revolutions,” a phrase the party adopted from Russia for popular unrest in the name of democracy and blamed on…