Lyndon Baines Johnson ( ; August 27 , 1908January 22 , 1973 ) , often referred to as LBJ , was an American politician who served as the 36th president of the United States from 1963 to 1969 . Formerly the 37th vice president of the United States from 1961 to 1963 , he assumed the presidency following the assassination of President John F. Kennedy . A Democrat from Texas , Johnson also served as a United States Representative and as the Majority Leader in the United States Senate . Johnson is one of only four people who have served in all four federal elected positions
assassination of President John F. Kennedy
Assassination of John F. Kennedy
Lyndon B. Johnson