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.
Answer:When the Aztecs saw an eagle perched on a cactus on the marshy land near the southwest border of Lake Texcoco, they took it as a sign to build their settlement there.
