Donald Trump supporters 'back his claims that election is rigged'

Donald Trump's dubious claims that the US presidential election is "rigged" have taken root amongst most of his supporters, a poll found, with many saying they will have serious doubts about the legitimacy of the outcome if Hillary Clinton wins.

In the Associated Press-GfK survey, just 35% of Mr Trump's supporters said they are likely to accept the result of the election as legitimate if Mrs Clinton wins, while 64% said they are likely to have serious doubts about the accuracy of the vote.