http://www.occupydemocrats.com/california-just-outlawed-undisclosed-dark-money-donations-to-political-campaigns/
"We are all familiar with the infamous 2010 Supreme Court Citizens United decision, in which the Court ruled that it was a violation of the First Amendment for the government to prohibit political expenditures by a nonprofit corporation. The decision unleashed a torrent of dark money into our politics, threatening the integrity of our democracy and giving the wealthy an unprecedented level of influence over our elections.
One of the biggest results of that decision was the rise of political action committees (PACs) and their larger counterparts (Super PAC) – a vehicle by which nonprofit groups contribute ‘dark money’ to ballot measures and candidates in California. Dark money is money whose source needn’t be disclosed – until yesterday – at least in California."