We knew Biden was just a placeholder when Xochitl Hinojosa had that epic meltdown and admitted as much.
From Breitbart:
"Xochitl Hinojosa, communications director for the Democratic National Committee (DNC), sparked confusion this week after stating during an appearance on Fox News that it is crucial for the party to hold its convention, because they are 'not officially nominating Joe Biden in order to take Donald Trump.'"
sauce: https://www.breitbart.com/politics/2020/05/14/dnc-communications-director-convention-must-happen-because-we-are-not-officially-nominating-joe-biden/