Not only that but Republicans have already said they would take it to the supreme court if anyone else is on the ballot.
Plus a completely new person might not even be on the ballot in multiple states being this late into the process. Harris can keep all the donations and is certified to be on the ballots.
I never liked Harris because she ran against Bernie and she seemed very fake and forced in 2019, on top of the prosecutor stuff making me think she was moderate.
However recently I actually looked at her voting record in the senate. She is more progressive with her votes than 99% of the senate, and there are only 100 of them. Right up there side by side with Bernie. She is even an original backer of the Green New Deal.
She has also seemed to have relaxed some, seems way less forced. Most importantly she isn’t in her 80’s and can actually complete sentences unlike anyone else running this decade.
The prosecutor stuff was a long time ago, and she has already been voted in as VP to step up for Biden if he gets too old. The tough on crime stuff might actually help her with independents and conservatives who don’t like Trump.
Yes as president she can select whoever she wants as VP.