Voting has been temporarily postponed in the Senate on proposals to stop, delay or pare back the Environmental Protection Agency’s regulation of greenhouse gases linked to climate change problems.

Republican and some Democratic lawmakers are jockeying to kill or alter EPA regulatory authority that began taking effect in January on controlling carbon dioxide pollution blamed for global warming.

Senate Majority Leader Harry Reid had been aiming for votes early on Wednesday on the proposed EPA amendments, which individual senators are trying to attach to an unrelated small business jobs bill.

But he now says he is aiming for sometime Thursday or Friday on the controversial measures, after some senators slowed down the process.