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Fewer than half of Warren’s supporters may defect to the second-placed senator.
The former vice-president’s victory in Texas and eight other states makes him the unambiguous favourite to take on Donald Trump.
Why the Democratic presidential frontrunner may be best described as a “class-struggle social democrat”.
The former vice-president has dented Sanders’ momentum but his rise may have come too late for him to win the nomination.
As well as mobilising a radical movement, the Democratic candidate should offer reassurance to centrist voters.
After two indecisive contests, the billionaire and former New York mayor is well placed to seize the momentum.
After being declared the winner of the Iowa caucus, the 38-year-old former small-town mayor is gaining momentum in the presidential race
Changing the primary system will be difficult. But the parties should try it.
Dispensing with smoke-filled rooms and party bosses in favour of open primaries certainly sounds more democratic. But, both in the US and other democracies, there are unintended consequences.
US politicians spend more time on the campaign trail than in any comparable nation, and open primaries are a big reason why. But it hasn’t always been like this.
Even a revived Bernie Sanders and former vice president Joe Biden look to be playing catchup.