Hello! A political party nominates their presidential candidate through having a series of elections. They hold caucuses and primaries. Caucuses are where party members say their reasons for supporting a certain candidate, while the primary elections are where the people vote for who they want as the party's candidate. There are a certain of delegates needed to become presidential nominee. Whoever gets that amount of delegates gets to be in the poll for the general election.
The appropriate response is "The Preamble does not plot the forces of the Constitution." The Preamble serves exclusively as a presentation, and does not allocate forces to the national government, nor does it give particular constraints on government activity. Because of the Preamble's constrained nature, no court has ever utilized it as an unequivocal factor in the event of mediation, aside from as respects silly case.
