You think she is vying for Kamalas job then Bidens?
No. I think she, like many others are doing what little they can do to help defeat this Satanic Putrid Evil Democrat/Deep State cabal -- TO SAVE HUMAN CIVILIZATION.
This is not rocket science.
Her message is that it is okay for people to leave the Democrat Party. It's that simple. And the timing seems appropriate for the elections in 4 weeks.
Tulsi is not running for any office that I know of.