THE CIVIL WAR

Lincoln suspended habeas corpus during the war and this is what the Supreme Court had to say about that and other infringements on civil liberty:

Ex Parte Milligan (1866)

"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."