When this country made its decision and went into this war, it was the duty of every American citizen to loyally support the Government of the United States in the prosecution of the war.
Representative Frederick W. Dallinger of Massachusetts, Speech to the U.S. House of Representatives, November 10, 1919
In the interest of national security, Congress debated the right to dissent, defined treasonous acts, and used highly controversial tactics to investigate individuals suspected to be subversives during the world wars. After the Pearl Harbor attack, more than 110,000 Japanese Americans were sent to internment camps, depriving them of their livelihoods, civil liberties, and the right to due process. And yet, a year later, Congress repealed long-standing, exclusionary measures to benefit China, an important ally. Congress also strove to strengthen bonds and symbols of national unity by revising the Pledge of Allegiance and protecting national treasures through the Library of Congress.