Mike Bloomberg: four issues that could derail his White House bid – video

Billionaire Mike Bloomberg has launched one of the most audacious campaigns for the US presidency in modern times – pouring almost half a billion dollars of his vast fortune into creating the most expensive nomination bid in US history. But the former mayor of New York is under intense scrutiny: here's a look at the key issues that could derail his race to the White HouseCan Mike Bloomberg buy his way to the White House?Continue reading...