www.motherjones.com/mojo/2013/07/grand-jury-california-campaign-money-laundering-schwab
"If prosecutors do move forward, their investigation could shine light on parts of the burgeoning network of conservative "social welfare" outfits that spent hundreds of millions in the last two elections. Under IRS rules, social-welfare groups can engage in political activities so long as that work is not their primary purpose, a loosely enforced rule often interpreted to mean that 49 percent of a group’s spending can go toward political work."
