Washington (CNN) - Senate Democrats announced Tuesday they will hold hearings beginning later this month examining what they see as the negative impact of super PACs on the election process.
They also will work to develop legislation to require the disclosure of all donors to the increasingly powerful political organizations.
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At the hearings, Democrats will ask organizers and possibly donors to testify.
"The more the public learn about this, the more reviled they will be about what's happening," said Sen. Chuck Schumer, D-New York. "That involves having hearings and asking people why they gave and what motivated them. Showing people the affects."
Democrats wouldn't say who they would ask to testify, but at a news conference they repeatedly complained about two organizations run by Republican Karl Rove that raised $51 million last year - $33 million of which came from undisclosed donors.
Super PACs are flooding the airwaves with advertising during the Republican presidential primaries and caucuses.
"There is a huge disjunction between the political community that sees this just as new fields to plow and the broader American public which is revolted," said Sen. Sheldon Whitehouse, D-Rhode Island, who will chair a new Democratic task force on the issue. "I don't care if you're the most diehard progressive or a staunch tea partier, I think there is agreement right across the spectrum that corporate spending, anonymous and unlimited in our political campaigns is bad for America and out of control."
Schumer said political organizations run by Democrats should also join the reform effort.
"To every super PAC, Democratic or Republican, join us in cleaning up this mess," Schumer said.
A Democratic bill in the Senate in 2010 to increase disclosure of donors to some of these groups fell short when all Republicans voted against it. Republicans were concerned the Democrats' bill would have restricted free speech and tilted the playing field in favor of the Democrats ahead of the mid-term elections.
The new push by Democrats is aimed at pressuring Republicans to reconsider their opposition.
"We're going to have to get public pressure on our colleagues, the Republicans, to make this happen," Schumer said. "I don't believe they will step forward on their own. There's too much party pressure on them."