We need to know: Is Trump nuts?

Donald Trump's mental state has been called into question, even by some of his supporters, with several calls being made for him to undergo a psychiatric examination. This followed a calamitous week for the Republican Party nominee for the US presidency.Trump's devastating wounds were mostly self-inflicted and arose from a series of bewildering gaffes, petty feuds and xenophobic comments that left even supporters questioning his state of mind and wondering if it were too late to replace him.