Eight justices—the exception being Ketanji Brown Jackson—seem keen to rein in universal injunctions. But a majority also appear committed to averting Mr Trump’s radical departure from the constitution’s promise of citizenship. The justices could thread that needle in three ways.

Standing amid a throng of fellow protesters outside the Supreme Court Thursday morning, Young Woon Han was worried about his future son or daughter.Han was born in Korea and is a lawful permanent resident living and working in Columbus,