The Republicans' main achievement has been to contain their own internal conflicts. The trouble is, they have done this entirely by uniting against their self-wounding opponents rather than by forging an alternative program.
The problems that the Democrats are trying to address - the struggling economy, the approaching fiscal breakdown, the broken health care system, the transition to clean energy - are not imaginary. They require solutions. The Republicans have none, and as soon as they try to get some their unity will collapse.
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