The Presidential elections in the United States are an exciting, yet contentious time. Every four years on the first Tuesday held after the first Monday in the month of November, American voters go to the polls. For months before the actual election, debates, primaries, and caucuses are held to introduce the people to the candidates who intend to run for the highest office in the United States.
Eventually, each political party decides on its official nominee. Though people can run as third-party or write-in candidates, the Presidential debates have almost always been between the Republican and Democratic nominees (the only exception to this being in 1992 when Ross Perot garnered high enough polling numbers to be invited).