Following a rebellion by two important factions of rank-and-file House Democrats, Speaker Nancy Pelosi (D-Calif.) has pulled a campaign-finance bill opposed by a broad coalition of special interest groups, including the U.S. Chamber of Commerce.

Pelosi and other Democratic leaders had scheduled a Friday vote on the DISCLOSE Act, a bill requiring special-interest groups to disclose their top donors if they choose to run TV ads or send out mass mailings in the final months of an election. The legislation is designed to roll back the controversial Supreme Court decision in the Citizens United case, which overturned restrictions on corporate campaign activities.

But after complaints from the conservative Blue Dogs and the Congressional Black Caucus, Pelosi was forced to pull the bill on Thursday night.

Pelosi’s office declined to comment on Thursday evening’s decision to pull the bill from the floor.

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