In my April 20 diary concerning AOC endorsing and serving Biden on April 19, including being willing to attending rallies with him.  I’d added in comments:

‘AOC says she is ‘having conversations with Biden’s team’ over policy’ April 16, 2020, nypost.com
“Speaking to Politico, AOC offered some praise of Biden, specifically that she was heartened by his pledge to name a female running mate and his interest in that person being of color.