Partners Join to Investigate Secret Spending

The Center for Public Integrity and Center for Responsive Politics investigated the rise in undisclosed political expenditures by “social welfare” organizations, or 501(c)(4)s. The organizations found that nearly 90 percent of spending by these nonprofits came from groups who did not disclose their funders. In the 2010 election, more than 100 of these nonprofits spent roughly $95 million in political expenditures.