www.telegraph.co.uk/news/worldnews/us-election/11928659/US-Election-2016-explained.htmlUS Election 2016 explained
The primaries, caucus states, conventions and the electoral college system explained in our handy guide to the 2016 US presidential election
By Keely Lockhart
3:43PM BST 13 Oct 2015
Once every four years the USA votes to decide on who its next president should be.
And even though Americans won't cast their ballots until November 8, 2016, the campaigning begins well over a year in advance.

The road to the White House is a long one, beginning over a year before the first vote is cast in the general election
For most of us who were not born or live in the USA, this process can seem a little confusing.
For starters, there's numerous candidates on the Republican and Democrat sides who are competing for votes in what is known as the primary elections.

There are plenty of Republican candidates running in the primaries, while Hillary Clinton dominates the Democrats
These candidates include the likes of Republicans Donald Trump, Carly Fiorina and Jeb Bush (to name a few)
The Democrats include Hillary Clinton, Lincoln Chafee and Bernie Sanders.
This group of presidential hopefuls spend the first half of the election battling it out in the debates, which take place across the country as they attempt to win popularity on key voter issues.
As well as a raft of presidential contenders, there's more than one voting system in play during the primaries.
And it's not until the middle of 2016 that a single presidential candidate will emerge on the Republican and Democrat sides.
In order to understand the US presidential election process, we've created this useful animated guide which explains all the key aspects of the electoral system.
Key dates:
September 16, 2015: Second Republican debate
October 13, 2015: First Democratic debate
February 1, 2016: The first votes cast at the Iowa caucuses
November 8, 2016: First votes cast in 2016 election