The Constitution of the United States is a law for rulers and people, equally in war and peace, and covers with its shield of protection all classes of men, at all times and under all circumstances. No doctrine involving more pernicious consequences was ever invented by the wit of men that any of its great provisions can be suspended during any of the great exigencies of Government. Such a doctrine leads directly to anarchy or despotism....
U.S. Supreme Court
in Ex Parte Milligan 4 Wallace 2 (1866) (David Davis (1815-1886) U.S. Supreme Court Justice)