Lyndon B. Johnson (1908-1973) was the 36th president of the United States, assuming the office after the assassination of President John F. Kennedy in November 1963. Prior to serving as Kennedy's vice president, Johnson had long represented Texas in the United States Senate.
When Vice President Johnson assumed the presidency, he inherited the escalating crisis in Vietnam. Despite promises to bring a swift end to American involvement in Indochina, Johnson steadily increased the number of U.S. troops deployed to Vietnam, hoping to ensure a U.S. victory before withdrawing forces. No American president had yet "lost" a war, and Johnson hoped he wouldn't be the first. By the end of his second term as president, his approval rates had plummeted and his hopes for bringing an end to the war in Vietnam had dissolved. On 31 March 1968, at the height of the Vietnam War, Johnson announced to the American people that he would not seek reelection.