Joe Biden's decisive victories in Florida, Illinois and Arizona on Tuesday effectively put the Democratic nomination out of reach for Bernie Sanders.
The former U.S. vice president won all three states by wide enough margins that he now has a majority of all delegates pledged so far, and more than half of the almost 2,000 he needs to secure the nomination at the party's national convention this summer.
As in past victories, Biden was propelled by strong support from women, African Americans, older voters and those who described themselves as moderates or conservatives, according to surveys conducted by The Associated Press. But he also won half of all voters age 30 to 44, cutting into Sanders's claim to younger voters. Sanders still won two-thirds of voters under 30, however.