Jose Padilla is an American citizen who has never fought on a traditional battlefield. He converted to Islam when in prison and later travelled to Pakistan. On returning to O’Hare Airport in Chicago, he was seized as a terrorist . . . The stakes are enormous: if the president can throw Padilla into jail on his say-so, no citizen is safe. After spending more than two years in confinement, Padilla finally got his case to the Supreme Court. But a majority seized on a jurisdictional pretext that will require him to wait another year or two while his case takes another detour in the lower courts. It’s a dark day when a citizen must wait in prison for three or four years before the court will even consider whether the government must prove its case against him in a court of law.
The American Constitution is the oldest in the world, but appearances are deceiving. Over the past two centuries, the Supreme Court has given very different meanings to the grand abstractions and...