In China-India Clash, Two Nationalist Leaders With Little Room to Give

They are both ambitious, nationalist leaders, eager to assert greater roles for their countries in a turbulent world. With major challenges at home, neither wants to risk losing face, even in a dispute over mountainous territory that is all but desolate.

Xi Jinping of China and Narendra Modi of India probably did not intend to ignite a clash on their border on Monday, high in the Himalayas, that killed 20 Indian troops and may have resulted in Chinese casualties, too. Yet the leaders of the two nuclear-equipped countries now confront...