Washington (CNN) - The Senate on Thursday is expected vote on a "resolution of disapproval" by an Alaskan senator that would prevent the Environmental Protection Agency from further regulating air pollution from vehicles and industrial facilities.
Alaska Sen. Lisa Murkowski, the author of the resolution, vowed Tuesday to strip the EPA of its authority to impose new limits on the emission of greenhouse gases.
Murkowski has the bipartisan support of 40 other senators, who may disagree with each other on the scientific impact of greenhouse gases, but who all agree that such regulations should be authorized by Congress, not an executive agency.
"The EPA intends to take control of climate policy, take it away from the Congress," Murkowski said at a press conference with 11 of her fellow Republican senators. "And I think those that are looking at this from the perspective of separate but equal branches of government look at this and say that this is absolutely unacceptable."
It is unclear whether there is enough support in the Senate to approve the measure, but its prospects in the House are slim.
The White House said it will issue a veto threat if the measure makes it to President Barack Obama's desk.
"(The Murkowski resolution) would undermine the Administration's efforts to reduce the negative impacts of pollution and the risks associated with environmental catastrophes, like the ongoing BP oil spill," said a White House policy statement.
At issue is a Supreme Court ruling from 2007 which determined that the EPA has the authority to regulate greenhouse gases under the rules of the Clean Air Act. In December 2009, the EPA concluded scientific findings and declared that carbon dioxide and five other gases constitute pollutants that should be further restricted. And the agency announced in April new rules for vehicles: a mandatory increase in fuel efficiency coupled with reductions in gas emissions, starting with 2012 model years.
Lisa Jackson, the EPA Administrator, wrote a column Monday in the Huffington Post accusing Murkowski of siding with "big oil companies and their lobbyists" in an effort to "take away EPA's ability to protect the health and welfare of Americans from greenhouse gas pollution."