The New Jersey senator tweeted his support to Biden this morning.
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.
He’ll restore honor to the Oval Office and tackle our most pressing challenges.
That’s why I’m proud to endorse Joe. pic.twitter.com/RcsnZs5mfQ
— Cory Booker (@CoryBooker) March 9, 2020
California Sen. Kamala Harris also endorsed Biden this weekend.