With less than 100 days to go in the presidential race, nine single-candidate “super” PACs — political action committees that can raise and spend unlimited sums on political expression – have spent $125 million advocating and advertising for their preferred candidate, a CBS News analysis of Federal Election Commission reports shows. Through the first half of 2012, the pro-Mitt Romney Restore Our Future, was the most active super PAC, raising $81 million and spending $60 million through June 30. Two-thirds of its spending, or $40 million, went to negative ads attacking Republican primary opponents Newt Gingrich and Rick Santorum. Super PACs established for six also-ran Republicans — Gingrich, Santorum, Ron Paul, Rick Perry, Jon Huntsman, Herman Cain — spent a combined $36 million dollars on advertising and advocacy during the primaries, which effectively ended when Santorum dropped out in April.