Lyndon Johnson is often said to have remarked, upon seeing himself skewered by Walter Cronkite, "If I've lost Cronkite, I've lost Mr. Average Citizen." Nowadays there is no Cronkite-like figure. And that story is likely apocryphal anyway. There may not have been a Cronkite-like figure when Cronkite was anchor either. https://mwi.westpoint.edu/war-public-opinion-myth-cronkite-moment/ Still, I have to say -- something happened that the story does represent. Lyndon Johnson won an epochal victory in 1964 -- in 1966, despite the usual opposition party midterm gains, Johnson and the Democrats held on to majorities in both Houses of Congress. Yet in early 1968 he had to step aside and he spent the rest of the year (futilely) trying to make his VP his successor. The shift had everything to do with the Vietnam War which of course had to be reported upon at home. So the story can be taken for its grain of truth. There was a "Cronkite moment" of some sort sometime...