Rubuta ci gaba don wannan sakin layi - A zamanin yau, al'ada ce ga manyan jam'iyyun siyasa 'yan takara su kasance "a sarari kafin tarurruka"; a baya, duk da haka, wasu tarurruka sun fara tare da sakamakon da ke cikin shakka, suna buƙatar zagaye da yawa na jefa kuri'a don zaɓar ɗan takara. Babban taron jam'iyyar na karshe tare da kuri'a fiye da ɗaya don shugaban kasa ya faru a 1972 ga 'yan Democrat da 1948
ga 'yan Republican.