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What Bernie Sanders has that Joe Biden doesn't

Why don't more young people vote?

How much does Bernie Sanders want to spend?

Super Tuesday results in full

Elizabeth Warren ends presidential bid

Who are the Democrats vying to take on Trump?

Winners and losers on Super Tuesday

Bloomberg ends US presidential campaign

Biden seals comeback with Super Tuesday victories

It was Biden's day - but what next for big three? Video, 00:02:00It was Biden's day - but what next for big three?

What unites these two bitter rivals? Video, 00:02:07What unites these two bitter rivals?

How Bernie Sanders always beat the odds

Public Enemy: 'Flavor Flav not fired over politics'

The Democratic 2020 race - in five charts

Flavor Flav out of Public Enemy after 35 years

Is this the best way to pick Trump's challenger? Video, 00:02:51Is this the best way to pick Trump's challenger?

The Democratic 2020 race moves south

Black football star confused for Bernie Sanders

Eighteen things Bernie Sanders believes

Rivals intensify attacks on Bernie Sanders

Rivals attack Sanders ahead of Democratic debate

Sanders unveils $1.5tn universal childcare plan

Nevada win boosts Sanders' front-runner status