The Texas chapter of the conservative advocacy group Americans for Prosperity held an event Wednesday called "All I Want for Christmas is Less Federal Spending." Alan Greenblatt/NPR hide caption

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David Koch, executive vice president of Koch Industries, attends an event at The Economic Club of New York last year. Mark Lennihan/AP hide caption

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After Tough 2012, Conservative Koch Brothers Regroup

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Democrats Say Anonymous Donors Unfairly Influencing Senate Races

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