In a brokered convention. The delegates to the convention are bound to their nominee only thru the first vote and if no nominee wins then the delegates are released to vote for anyone.
Look at what she is doing.
She is putting herself into the light every time a campaign event comes up. The media is so keyed in on her that she can do this cheaply. Plus, she has a dedicated constituency that may be narrow but it is very deep.
As time goes by and the primary campaign heats up, the primaries and caucuses come more frequently, this becomes harder and harder to do.
She needs to go away if she is not running w her games she is playing.
Possible, as anything may be, but highly unlikely. Want to know what would be a perfect scenario for Palin? Assume Bolton, or a similar type, is next Sec of State. She should be Under Sec for four years.