Most respected Democratic law makers
Logevall, Fredrik. “There Ain’t No Daylight: Lyndon Johnson and the Politics of Escalation.” New York: Oxford University Press, (2008): 93.
Increase in American military advisors and troops
Malesky, Edmund J. “Vietnam War.” International Encyclopedia of the Social Sciences 1, no. 2 (2008): 614.
1968 election
“Johnson Invited Thieu for Talks on Vietnam Peace,” The Jerusalem Post, April 2, 1968.