A bipartisan group of lawmakers and congressional candidates has filed a complaint with the Federal Election Commission seeking to prevent big donors from having an outsized influence on the electoral process.

The 34-page complaint, filed by “Free Speech for People” on behalf of two sitting House members, one senator, and three candidates who are challenging congressional incumbents, comes against 10 “super PACs,” including the Republican Congressional Leadership Fund and the Democratic House Majority PAC. The PACs are able to accept unlimited funds and make unlimited expenditures on behalf of candidates.