Republicans have rejected this interpretation of Citizens United, and said the decision rightly ended the government's authority to limit both corporate and union political speech.

House Budget Committee ranking member Chris Van Hollen (D-Md.) added that the change would only require companies to say how they have weighed in on campaigns, and is not an attempt to override the Citizens United decision.

Rep. Anna Eshoo (D-Calif.) introduced the amendment to the fiscal 2011 spending bill that would set this prohibition. But it was shot down through a Republican point of order because the amendment would legislate on a spending bill.

Eshoo's amendment is just one of several funding limitation amendments to the bill that were being considered on Thursday, which is when House Republicans hope to finish work on the bill.