Robert Costa @costareports
SANDERS ENDORSES BIDEN... https://t.co/qGcuCPtbXd — PolitiTweet.org
Marianna Sotomayor @MariannaNBCNews
HAPPENING NOW: @BernieSanders endorses @JoeBiden on his virtual campaign event. "To support your candidacy that I… https://t.co/K4OLY4rBWd