She is, but no longer has the 'balls' (literal sense and not sexually) she once had we she contested against Biden for democrats leadership. She seems contempt to lie low than rather prepare herself that she is ready to step in Biden's shoes at any given moment should his general health or mental state gets the better off him.
It just seems behind the scenes that the democrats are not ready or willing to prepare Harris to step in which is a dangerous precedence when Jill Biden is the force pushing her own husband to stay even though she knows her husband has some form of dementia.
Biden needs some form of medical NZT-48 neurotrophic wonder drug like from the movie Limitless...