From March 8 to June 7, 1960, voters and members of the Democratic Party elected delegates to the 1960 Democratic National Convention through a series of caucuses, conventions, and primaries, partly for the purpose of nominating a candidate for President of the United States in the 1960 election. The presidential primaries were inconclusive, as several of the leading contenders did not enter them, but U.S. Senator John F. Kennedy of Massachusetts emerged as the strongest candidate and won the nomination over Lyndon B. Johnson at the convention, held from July 11 to 15 at the Los Angeles Memorial Sports Arena.
Recalling the experience of 1928 Democratic nominee Al Smith (who was Catholic), many wondered if anti-Catholic prejudice would affect Kennedy's chances of winning the nomination and the election in November. To prove his vote-getting ability, Kennedy challenged U.S. senator Hubert Humphrey of Minnesota, a liberal, in the Wisconsin primary. Although Kennedy defeated Humphrey in Wisconsin, his reliance on heavily Catholic areas left many party bosses unconvinced. Kennedy thus faced Humphrey in the heavily Protestant state of West Virginia. Humphrey's campaign was low on money and could not compete with the well-organized, well-financed Kennedy team. Kennedy's siblings combed the state looking for votes, leading Humphrey to complain that he "felt like an independent merchant running against a chain store." On primary day, Kennedy crushed Humphrey with over 60% of the vote, and Humphrey withdrew from the race.