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. Kennedy won the West Virginia primary, impressing many in the party, but at the start of the 1960 Democratic National Convention, it was unclear as to whether he would win the nomination.