I refuse to speculate on hypotheticals like this. Let’s see who is running and what kind of campaign they put together.
My own preferences aside, should Palin not run, whomever she throws her support to will have a huge advantage, I would expect.
That was going to be my next question, how important would a Palin endorsement be, if she chooses not to run....
For me, not very, if she were to endorse Romney, it wouldn't make me support him, it would make me hate her, lol.
If she supported Michele Bachman, it would simply reconfirm my support.
If it was someone like Newt Gingrich or Mitch Daniels, then, maybe, it might sway me a little bit, and make me take a better look, but either way, I'll still make up my own mind.