If the Trump administration succeeds in blocking Harvard from enrolling international students, the hardest-hit group would be students from China, who make up the school’s biggest share of current students from overseas.The consequences are likely to extend far beyond those select few who could gain entry to the prestigious university. The move could reshape the broader relationship between the two countries by cutting off one of the few remaining reasons that people in China still admire the United States.The flow of students from China to the United States has long been one of the most reliable ballasts in the two...