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Coronavirus crisis may delay Biden's crowning as nominee
After Tuesday wins, he has nearly unbeatable lead over Sanders, who's assessing campaign
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Former vice-president Joe Biden's sweep of the Arizona, Illinois and Florida Democratic primaries on Tuesday indicates that the contest for the party's presidential nomination appears to be over.
But the ongoing coronavirus crisis may drag out the process of officially crowning him as the nominee to take on United States President Donald Trump in November. Five states so far have postponed their primary elections.
