What we know so far:
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Donald Trump suffered a major setback in Iowa overnight, as the Republican hopeful came second in the first caucus to Texas junior senator Ted Cruz.
The contest between Democratic hopefuls came down to the wire, with Hillary Clinton beating her left-wing rival Bernie Sanders by under one percentage point.
After months of speculation, debate, outrage and bizarre tribute acts we will discover whether Donald Trump really has the support as survey’s suggests.
Iowa is seen as a key moment in the election calendar. It marks the first time in the election that the people have their say, putting an end to the polls and speculation that inevitably take place in the weeks and months before the elections really get going, choosing which hopeful they want to represent their party in the race for the White House.
As Harry Lambert wrote in a recent blog for The Independent, “Once again, the people of Iowa — along with those in New Hampshire, South Carolina and Nevada will wield the considerable power they have to shape the contest to become the leader of arguably the world's most powerful country.”
To see all of our coverage of the Iowa caucus, visit our US elections page.
