Primärvalet i USA inleds – så tänker omvärlden: ”Ryssland vill ha Trump”

The Iowa Caucus is an electoral event in which residents of the U.S. state of Iowa meet in precinct caucuses in all of Iowa's 1,681/1,682 precincts and elect delegates to the corresponding county conventions. There are 99 counties in Iowa, and thus there are 99 conventions. These county conventions then select delegates for both Iowa's Congressional District Convention and the State Convention, which eventually choose the delegates for the presidential nominating conventions. The Iowa Caucus is noteworthy for the amount of media attention they receive during U.S. presidential election years. Since 1972, the Iowa caucuses have been the first major electoral event of the nominating process for President of the United States. Although only about 1% of the nation's delegates are chosen by the Iowa State Convention (25 Republican delegates in 2012, assigned proportionately), the Iowa caucuses have served as an early indication of which candidates for president might win the nomination of their political party at that party's national convention, and which ones could drop out owing to lack of support. In 2016, the Democratic and Republican Iowa Caucus is scheduled to occur on February 1.

The series of presidential primary elections and caucuses held in each U.S. state and territory is part of the nominating process of United States presidential elections. This process was never included in the United States Constitution; it was created over time by the political parties. Some states only hold primary elections, some only hold caucuses, and others use a combination of both. These primaries and caucuses are staggered generally between January and June before the general election in November. The primary elections are run by state and local governments, while caucuses are private events that are directly run by the political parties themselves. A state's primary election or caucus is usually an indirect election: instead of voters directly selecting a particular person running for President, they determine how many delegates each party's national convention will receive from their respective state. These delegates then in turn select their party's presidential nominee. Each party determines how many delegates are allocated to each state. Along with those delegates chosen during the primaries and caucuses, state delegations to both the Democratic and Republican conventions also include "unpledged" delegates, usually current and former elected officeholders and party leaders, who can vote for whomever they want. This system of presidential primaries and caucuses is somewhat controversial because of its staggered nature. The major advantage is that candidates can concentrate their resources in each area of the country one at a time instead of campaigning in every state simultaneously. However, the overall results may not be representative of the U.S. electorate as a whole: voters in Iowa, New Hampshire and other small states which traditionally hold their primaries and caucuses first usually have a major impact on the races, while voters in California and other large states which traditionally hold their primaries last in June generally end up having no say because the races are usually over by then. As a result, more states vie for earlier primaries to claim a greater influence in the process.

Presidentvalet i USA 2016 avgörs i USA den 8 november 2016. Presidentvalet är det 58:e i ordningen, och USA:s president och USA:s vicepresident ska väljas för mandatperioden 2017 till 2021. Den sittande presidenten Barack Obama kan enligt reglerna inte återväljas 2016, då han suttit två mandatperioder.