A leading pollster has said it's getting harder and harder to call elections as politics becomes more volatile.
Several polls predicted a victory for Hillary Clinton last night, but Donald Trump shocked the world by emerging triumphant.
The result follows a similar embarrassment for pollsters in June's UK EU referendum, which ended in victory for the Leave campaign despite all the polls having predicted a triumph for Remain. The 2015 British election also confounded the experts, yielding a Conservative majority rather than the widely expected hung parliament.
Ben Page, the Head of Polling at leading market research company Ipsos Mori, told Julia Hartley-Brewer that “As politics becomes more volatile, you have to make a judgement call on whether people are really going to turn out to vote."