If enough crossover Democrats voting in primaries think this, she will end up the GOP candidate. Is she at least as alive as a ham sandwich? Check. Ergo, a shoo-in.
Many democrats are opposed to the No Fly Zone in Libya. Sarah Palin has supported the action taken in Libya. There would be less crossover for Palin on this issue.
Let's hope Trump also agrees with the Obama Doctrine (he we're hoping he does not win)