Political Party Positions
Democratic Party
The Democratic Party has positioned itself against Super PACs. With a less affluent base than the GOP and positions unlikely to draw support from business, the Democrats receive decidedly less support from Super PACs than Republicans.
Until recently, President Obama held a position against Super PACs. Despite his condemnation of the Citizens' United decision, in January Obama called upon staffers to solicit donations via Super PAC. Many in his party have defended the change, noting that one cannot "fight with the gloves off" in the election.
Republican Party
The GOP has been largely supportive of Super PACs. Based on their affluent base and positions favored by business, Republicans have been the main beneficiary of Super PAC expenditures (2010 Outside Spending). Republicans regained the House of Representatives in 2010 with help from Super PACs, e.g. American Crossroads. All major Republican candidates for President have benefited from Super PAC fundraising and expenditures.
John McCain is a notable exception. He has long been a proponent of campaign finance reform. McCain has denounced the Citizens' United decision, which overturned the McCain-Feingold Act. He has also spoken out against the corrupting influence of Super PACs
The bottom line: neither political party is campaigning on a reform of campaign finance laws; both parties are using Super PACs and 501(c)(4)s.