The presidency of Lyndon Baines Johnson began on November 22, 1963, when Johnson became the 36th President of the United States upon the assassination of President John F. Kennedy, and ended on January 20, 1969. He had been Vice President of the United States for 1,036 days when he succeeded to the presidency. A Democrat from Texas, he ran for and won a full four-year term in the 1964 election, winning by a landslide over Republican opponent Arizona Senator Barry Goldwater. Johnson did not run for a second full term in the 1968 presidential election, he was succeeded by Republican Richard Nixon. His presidency marked the high tide of modern liberalism in the United States. In addition to his Supreme Court appointments, Johnson appointed 40 judges to the United States Courts of Appeals, and 126 judges to the United States district courts. Here too he had a number of judicial appointment controversies, with one appellate and three district court nominees not being confirmed by the U.S. Senate before his presidency ended.