Humphrey 's defeat in 1960 had a profound influence on his thinking ; after the primaries he told friends that , as a relatively poor man in politics , he was unlikely to ever become President unless he served as Vice President first . Humphrey believed that only in this way could he attain the funds , nationwide organization , and visibility he would need to win the Democratic nomination . So as the 1964 presidential campaign began , Humphrey made clear his interest in becoming Lyndon Johnson 's running mate . At the 1964 Democratic National Convention , Johnson kept the three likely vice-presidential candidates , Connecticut Senator Thomas Dodd , fellow Minnesota Senator Eugene McCarthy , and Humphrey , as well as the rest of the nation , in suspense before announcing his choice of Humphrey with much fanfare , praising his qualifications at considerable length before announcing his name
1964 Democratic National Convention
1964 Democratic National Convention
Hubert Humphrey