Billionaire populist Donald Trump, tapping into an electorate fed up with Washington insiders, was on the verge of a shock victory Wednesday over Hillary Clinton in a historic US presidential election that sent world markets into meltdown.
State-by-state, one-by-one, the 70-year-old maverick Republican tycoon racked up victories in defiance of the forecasts of pundits and pollsters, before arriving within striking distance of the White House.