Brittan,
Explain how she doesn't win these two states easily once Huckabee bows out? The reason why it's pretty clear she's in the lead is because she's leading with Huckabee in the race.
McCain won his primary easily by getting between 33-37% in states. There's no reason to believe she wouldn't surpass McCain's numbers with Huckabee (or even Ron Paul) out of the race.
The mantra that what she gets now is all that she's going to get is pretty unsupported since Romney, Huckabee, Gingrich are all very well known themselves.
McCain won because he was the default candidate after everyone else had been defeated or rejected, ending with Romney. It's such a different situation.
I just have a hard time seeing Palin get through to the end because there is surely a majority of Republican voters who are "anyone but Palin" and the party establishment is almost uniformly opposed to her. They will find a way to stop her unless they are helplessly divided.