"Balance of U.S. War Powers." Council on Foreign Relations, 1 Dec. 2013, www.cfr.org/backgrounder/balance-us-war-powers.
Boissoneault, Lorraine. "Eleven Times When Americans Have Marched in Protest on Washington." Smithsonian Institution, 17 Jan. 2017, www.smithsonianmag.com/history/suffrage-civil-rights-war-and-puppets-when-and-why-americans-have-marched-washington-180961809/.
Johnson, Haynes. "1968 Democratic Convention: The Bosses Strike Back." Smithsonian Institution, Aug. 2008, www.smithsonianmag.com/history/1968-democratic-convention-931079/.
"Pentagon Papers." National Archives and Records Administration, www.archives.gov/research/pentagon-papers.