… Forget super PACs, their much-hyped cousins, which can take unlimited contributions but must name their donors. More money is being spent on TV advertising in the presidential race by social welfare nonprofits, known as 501(c)(4)s for their section of the tax code, than by any other type of independent group. …
Our examination shows that dozens of these groups do little or nothing to justify the subsidies they receive from taxpayers. Instead, they are pouring much of their resources, directly or indirectly, into political races at the local, state and federal level. [cont.]
Kim Barker, ProPublica