Nikki Haley has already moved to center. Could she later switch and run as an independent, stealing votes from both Trump and Biden but mostly weakening Trump. I just don’t see a clear cut election between just Biden and Trump happening.
Elections are at least partially about logistics.
It is too late to form a new third party and get on the ballot in most states.
The only way she could run on a third party and be on the ballot in most states would be to get the nomination from the Green Party of the Libertarian Party.
Those are highly unlikely.
This is the same issue RFK Jr. is facing right now. His own effort to get on the ballots is struggling. He is trying to convince one of these other parties to take him.
She will steal from Biden,nobody who would vote 4 Trump would vote 4 her