His religion also helped him win a devoted following among many Catholic voters. Kennedy faced several potential challengers for the Democratic nomination, including Senate Majority Leader Lyndon B. Johnson, Adlai Stevenson II, and Senator Hubert Humphrey.[117]

Kennedy and Richard Nixon before their first televised 1960 debate
Kennedy's presidential campaign was a family affair, funded by his father and with his younger brother Robert, acting as his campaign manager. John preferred Ivy League policy advisors, but unlike his father, he enjoyed the give and take of Massachusetts politics and built a largely Irish team of campaigners, headed by Larry O'Brien and Kenneth O'Donnell. Kennedy traveled extensively to build his support among Democratic elites and voters. At the time, party officials controlled most of the delegates, but several states also held primaries, and Kennedy sought to win several primaries to boost his chances of winning the nomination. In his first major test, Kennedy won the Wisconsin primary, effectively ending Humphrey's hopes of winning the presidency. Nonetheless, Kennedy and Humphrey faced each other in a competitive West Virginia primary in which Kennedy could not benefit from a Catholic bloc, as he had in Wisconsin. 