OpenStax
Open Stax: Political Storms 1968 1980: Coming Apart, Coming Together
Page discusses the election of 1968 in which Richard Nixon garnered the votes of white blue-collar workers and moderate southerners to become president. Questions for discussion, glossary and links to primary source material.
New York Times
New York Times: On This Day: March 31, 1968
Front page of the New York Times with major story on Johnson's decision not to run in 1968. Links to related stories.