CBS Evening News a one-evening test broadcast on August 19, 1965, before permanently switching to the format on January 31, 1966. Cronkite's prime time special report, "Who, What, When, Where, Why", broadcast on February 27, 1968, ended with his declaration that the United States could only hope for a stalemate in Vietnam. It is often credited with influencing Lyndon Johnson's decision to drop out of the race for President. "If I've lost Walter Cronkite ... [I]'ve lost Middle America", he stated. Under Cronkite, the newscast began what would eventually become an 18-year period of dominating the ratings among the network evening news programs.
Walter Cronkite other news presenters bore the title before him. Cronkite anchored the network's coverage of the 1952 presidential election as well as later conventions. In 1964 he was temporarily replaced by the team of Robert Trout and Roger Mudd; this proved to be a mistake, and Cronkite returned to the anchor chair for future political conventions. From 1953 to 1957, Cronkite hosted the CBS program "You Are There", which reenacted historical events, using the format of a news report. His famous last line for these programs was: "What sort of day was it? A day like all days, filled with those