Ken Burns' Vietnam series exposes the genesis of the term 'credibility gap'

Ken Burns' Vietnam series exposes the genesis of the term "credibility gap" which knocked the Administrative State off its pedestal of competence achieved by the successful prosecution of World War II. A great sacrifice being asked requires a credible vision.  Official statements that prove not to be true ate away at Johnson's War on Poverty as well as in Vietnam.  And it snowballed into Ronald Reagan's 1980 campaign quip about the scariest words in the English language; "I'm from government, I'm here to help."