Revealing Dark Money and Big Data

Bradley Smith, Chairman and Co-Founder of the Center for Competitive Politics, Adam Rappaport, Chief Counsel of Citizens for Responsibility and Ethics in Washington, and ProPublica’s Kim Barker discuss how social welfare nonprofit groups, known as 501(c)(4)s are avoid regulation to finance the campaigns. They’ve already spent more than $71 million on television ads, more than all super PACs combined, according to estimates from Kantar Media's Campaign Media Analysis Group. Kim Barker has been reporting the series Revealing Dark Money and Big Data for ProPublica.