Primary. I was starts the actual process of selecting a president. The election begins tonight in iowa. Since the caucuses began in 1872, the claim victory, whether the becoming nominee depends on which party they come from. For democrats, these seven saw their names eventually on the general Election Ballot but for republicans only 4 have won i will and gone on to win the nomination, a 20 Year Gap between george w. Bush and donald trump, going from a win to the seat in the oval office, only jimmy carter, Barack Obama and george w. Bush have won a contested caucus in iowa and then become president. What iowa does introduces surprises. It has always been that way, in 1972 George Mcgovern was a Longshot Editor used his second