Building their war chests

363: Number of registered U.S. super PACs


$130.3 million: Total raised so far by super PACs during 2012 election cycle


$34 million: Total spent by Romney's Restore Our Future super PAC, more than Gingrich's, Santorum's, Paul's and Obama's combined


14: Number of 501(c)(4) nonprofit groups that have funded ads directly for or against political candidates


33: Percentage of all super PAC spending that came from Karl Rove’s American Crossroads during the 2010 election cycle

See more stats on super PAC spending here.