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Brokered convention, come on baby, brokered convention. BIG fun.
The only downside of this circus is that it's giving Paul followers hope that their guy will somehow walk away with the nomination, so they're still running around with their hair on fire. Other than that, this is becoming very entertaining.
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I don't see it ever getting that far.
Here's what I think will happen. If Santorum wins Michigan and places well in Arizona (Rasmussen has him only 8 points behind Romney), at that point, Gingrich gets out of the race and gets behind Santorum. This is the doomsday scenario for Romney, when the anti-Romney's only have one pick, and they take it. At that point, Santorum will start stacking up the votes and the delegates.... If by some miracle, he actually win Arizona, too (not outside the realm of possibility), the establishment will start abandoning Romney like a sinking ship. They'll flail around looking for an alternative again, but it's too late to go there.
If Romney wins both states, Gingrich will probalby stay in, but neither he nor Santorum will garner enough delegates to win, and the state apparaticks in places like Maine and Missouri will end up still giving him delegates he really didn't earn.