What does it take to win the Democratic nomination in 2016?

Elizabeth Warren, candidate for the US Senate in Massachusetts, addresses the second session of the Democratic National Convention in Charlotte (REUTERS/Eric Thayer)

Get out your pitchforks, Democrats! A showdown over populism is coming.

The core of the problem is the decline of Democratic support among white working-class voters.

White voters without a college degree made up 36 per cent of the