Super PAC spending

Independent political organizations known as "super PACs" are the wild cards in this year's election, the product of a series of court rulings, including the Supreme Court's Citizens United decision in January 2010. A total of 266 super PACs have spent $546.5 million  78% of which has been spent opposing candidates. Here's a look at the spending to date, in support and in opposition, according to reports filed with the Federal Elections Commission.

Interactive: Outside spending shapes 2012 election

Last updated: Nov. 20, 2012 | 10:59 a.m.