Dark Money Illuminated: 75% $ from 15 groups
Issue One report on top 15 dark money groups
"75 percent of the $800-plus million spent by all dark money organizations between January 2010 and December 2016. They spent the majority of this money on negative attack ads, criticizing candidates from the shadows while purposefully hiding their donors and masquerading as trade associations or “social welfare” nonprofits."
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