Never happen.
Here is what I think is REALLY the issue. This election cycle, for the first time, the Republican primaries will apportion delegates in proportion to the vote - no more winner take all. With three or more first tier candidates and two or three strong second tier candidates, and tossing in regional idiosyncrasies, it is likely that NO candidate will have locked up the nomination until very late in the primary process, if then. This may wind up a real brokered convention.
At any rate, unlike most recent Republican presidential primary races, this time it will not be wrapped up early. Palin can come in relatively late and will have as good a chance as anyone of going into the convention with substantial support. Clinch the nomination or not, this is how she can influence the outcome and the selection of the eventual nominee.
Cool. A thoughtful and insightful response.
Ping