George Soros and Other Lefty Moneybags Types Aren't Primarying Lousy Old Democrats Because the Party Is More Ideologically Diverse! Wait, What?

Former Reasoner David Weigel has an interesting article up that seeks to answer why there aren't any Club For Growth/FreedomWorks/Tea Party/Paulista-style primary-election challenges to the worst of the Democratic Party's status quo (like, say, the execrable Dianne Feinstein). This section in particular is unintentionally revealing:

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