Every one of those potential candidates is going to be subject to a veiled threat in exchange for the endorsement - do this for me, or I will destroy you.
Just put Herself in a position of power where great lucrative deals can be endlessly concluded, while remaining immune from any prosecution, and retain all the love and adulation that has been the birthright of Herself from the very beginning.
If you think she would voluntarily step aside and not be the nominee, you still don’t know Hillary well enough.
If she’s talking to them, it’s to tell them their job is to sheepherd everyone on the Left who swore never to support her again into supporting her again. She is not endorsing anybody and would sooner have the rival candidates killed then step aside for them.