Clinton’s Superdelegates Are Ultimate Firewall to Block Sanders

A plan to persuade some of her backers to switch may give hope to Sanders’ most ardent voters, but even some of his own superdelegates don't give that much of a chance.

How the 2016 Democratic Contest Mirrors 2008

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Hillary Clinton's first firewall against Bernie Sanders was going to be South Carolina, then the Super Tuesday states. With each Sanders victory somewhere else, it shifted further out, even as she built up an imposing lead in the Democratic nomination race.

Her latest chance to seal the deal is New York's primary next Tuesday and five more northeastern state contests the following week.