The day after the Supreme Court ruled that detainees imprisoned at Guantanamo are entitled to seek habeas corpus hearings, John McCain called it "one of the worst decisions in the history of this country." Well. Does it rank with Dred Scott v. Sanford (1857), which concocted a constitutional right, unmentioned in the document, to own slaves and held that black people have no rights that white people are bound to respect? With Plessy v. Ferguson (1896), which affirmed the constitutionality of legally enforced racial segregation? With Korematsu v. United States (1944), which affirmed the wartime right to sweep American citizens...