A recent poll has Donald Trump leading Hillary Clinton. Handicapping this horse race is futile, given the volatile American electorate. But the question remains: how can a reality TV “blowhard” with an enlarged, fragile ego, impulse-control problems and bad hair be so close to becoming President of the United States? Some answer that it’s economic hard times for those left behind by globalisation. Others point to income inequality. Still others blame an increasingly minute and punitive political correctness. And of course there’s the omnibus explanation that lots of Americans are racists, homophobic and anti-immigrant.