From PPP's latest poll of the winner-take-all state:
You can make a fair argument that Romney's already won the Arizona primary. Almost half of those planning to vote have already cast their ballots, and Romney has a 48-25 advantage over Santorum with those folks. That lead makes it nearly impossible for Santorum to make up the difference on election day, and Romney has a 39-27 advantage with those planning to vote on Tuesday anyway.
Ed Morrissey explains what this means for Santorum:
ARG has it much closer in Arizona at 39/35 Romney in a poll taken Thursday and Friday. However, they also show a big advantage for Romney among early voters, 50/29, and 48% of their sample had already cast their ballots. A loss in Arizona won’t matter as much to Santorum as a loss in Michigan will. A loss in a key Rust Belt state, where Santorum’s draw among blue-collar workers should be felt most, will be seen as a setback after his large polling leads of a week ago. Santorum needs the momentum from at least one win to help him sail through a tough Super Tuesday next week.
The Dish 
