Her text starts off with "Let's be clear, Curt" and goes on to say no one is above the law (or should be). She knows me! A personal message from the VP, wow! The text includes her photo. (Yes, 😉 I know these are mass text messages from the DNC. Joe Biden, Doug Emhoff, Jimmy Kimmel, Barack Obama and others all call me Curt.)
Her message is all about defeating Trump, SCOTUS's bad decisions and how they are a threat to democracy. Anyway, what jumps out is that there is no mention of Joe Biden, except in the link at the end to joebiden.com where I am invited to donate. This text could just as easily be a text message promoting Harris and her VP pick.
It sure looks like the Democrats are planning/expecting a change in the nomination. At least they are preparing themselves for that eventuality.