New Jersey Sen. Cory Booker, a former Democratic presidential candidate, endorsed Joe Biden’s White House bid Monday — becoming the latest of the former vice president’s old primary rivals to back his campaign over that of Vermont Sen. Bernie Sanders.

“The answer to hatred & division is to reignite our spirit of common purpose,” Booker wrote on Twitter. “@JoeBiden won’t only win – he’ll show there’s more that unites us than divides us. He’ll restore honor to the Oval Office and tackle our most pressing challenges. That’s why I’m proud to endorse Joe.”

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