“The answer to hatred & division is to reignite our spirit of common purpose. @JoeBiden won’t only win – he’ll show there’s more that unites us than divides us,” Booker tweeted.
“He’ll restore honor to the Oval Office and tackle our most pressing challenges. That’s why I’m proud to endorse Joe.”
Booker is the latest former 2020 rival to endorse Biden. Over the weekend, California Sen. Kamala Harris offered her support.