The shift from party-centered politics to candidate-centered politics was in the era of John F Kennedy in 1960.
John F Kennedy won against incumbent Vice president Richard Nixon by carefully cultivating the news media and crafting an effective public image. He single handledly raise money to support his campaign
Due to John F Kennedy's victory, the candidate started focusing on appearance because of television, and was required to raise more money because of the different means of advertising and campaigning.
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