Republicans on Thursday said that House Democrats have been less than transparent in bringing their major campaign finance bill to the floor, arguing that key negotiations have taken place behind closed doors. 

The House is poised to vote on the bill Thursday, but the ranking Republican on the Rules Committee, Rep. David Dreier (Calif.), said that debate on the Dislcose Act will be unfairly limited. 

"Although the legislation was described as 'fundamental to our democracy' by Speaker [Nancy] Pelosi, it will debated for just an hour and only after a brand new manager’s amendment that rewrites the bill is adopted without its own up or down vote," their release says. "One must wonder, why the rush to jam through a bill opposed by more than 400 advocacy groups? It’s not as if the House is working on a budget or anything."

Republicans are largely opposed to the legislation, which slaps disclosure requirements on corporations and unions in response to a January Supreme Court decision that removed limits on their political spending. 

But some liberals in the House have also expressed reservations about an exemption designed for the National Rifle Association that was included in the bill. 

Republicans pounced on those fears, saying in the release that the negotiations for the provision were held behind closed doors and that lawmakers will not get a chance to vote on the provision independently, among other complaints about lawmakers not having enough time to read the bill.

Vincent Morris, a spokesman for the Rules Committee Democrats, dismissed the GOP's claims as a "stack of baloney."

"As always, the Rules Committee accommodated the minority by providing unlimited time to speak on the Disclose bill during our meeting," he said. "Some of their members didn’t bother showing up to testify or submitted amendments that were non-germane or would have gutted the bill. And the bill itself has been public, posted on our site and available for several weeks. So I think the closed debate charge is a stack of baloney.”