Proper constitutional interpretation takes both text and past practice as its object: Lawyers and judges faced with a contemporary constitutional issue must try to construct a coherent, principled, and persuasive interpretation of the text of particular clauses, the structure of the Constitution as a whole, and our history under the Constitution—an interpretation that both unifies these distinct sources, so far as this is possible, and directs future adjudication. They must seek, that is, constitutional integrity. So fidelity to the Constitution\u27s text does not exhaust constitutional interpretation, and on some occasions overall constitutional integrity might require a result that could not be justified by, and might even contradict, the...