President Xi Jinping of China, left, greets President Donald Trump outside the Great Hall of the People in Beijing during their two-day summit, May 14, 2026. President Trump’s warming with Xi Jinping of China, a leader he admires, has ignited anxieties in Washington and across Asia. (Kenny Holston/The New York Times) By EDWARD WONG After meeting with China’s top diplomat in Malaysia last summer, Secretary of State Marco Rubio uttered a line that made few waves at the time but would later help…