The reason for this exponential leap in political spending, if you talk to most Democrats or read most news reports, comes down to two words: Citizens United. The term is shorthand for a Supreme Court decision that gave corporations much of the same right to political speech as individuals have, thus removing virtually any restriction on corporate money in politics. The oft-repeated narrative of 2012 goes like this: Citizens United unleashed a torrent of money from businesses and the multimillionaires who run them, and as a result we are now seeing the corporate takeover of American politics.

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