How the 2012 GOP primary became such a mess—and what it means for the future of the party:

“That Mitt Romney finds himself so imperiled by Rick Santorum—Rick Santorum!—is just the latest in a series of jaw-dropping developments in what has been the most volatile, unpredictable, and just plain wackadoodle Republican-nomination contest ever. Part of the explanation lies in Romney’s lameness as a candidate, in Santorum’s strength, and in the sudden efflorescence of social issues in what was supposed to be an all-economy-all-the-time affair. But even more important have been the seismic changes within the Republican Party. ‘Compared to 2008, all the candidates are way to the right of John McCain,’ says longtime conservative activist Jeff Bell. ‘The fact that Romney is running with basically the same views as then but is seen as too moderate tells you that the base has moved rightward and doesn’t simply want a conservative candidate—it wants a very conservative one.’”