President Obama has vetoed a pair of measures by congressional Republicans that would have overturned the main pillars of his landmark climate change rules for power plants.

The decision was widely expected; Obama and his staff had repeatedly threatened the action as a way to protect a top priority and major part of his legacy.

ADVERTISEMENT

The White House announced early Saturday morning, as Obama was flying to Hawaii for Christmas vacation, that he is formally not taking action on the congressional measures, which counts as a “pocket veto” under the law.

“Climate change poses a profound threat to our future and future generations,” the president said in a statement about Republicans’ attempt to kill the carbon dioxide limits for existing power plants.

"The Clean Power Plan is a tremendously important step in the fight against global climate change,” Obama wrote, adding that “because the resolution would overturn the Clean Power Plan, which is critical to protecting against climate change and ensuring the health and well-being of our nation, I cannot support it.”

That rule from the Environmental Protection Agency mandates a 32 percent cut in the power sector’s carbon output by 2030.

He had a similar argument in support of his regulation setting carbon limits for newly built fossil fuel power plants, saying the legislation against it “would delay our transition to cleaner electricity generating technologies by enabling continued build-out of outdated, high-polluting infrastructure.”

Congress passed the resolutions in November and December under the Congressional Review Act, a little-used law that gives lawmakers a streamlined way to quickly challenge regulations from the executive branch.

Obama had made clear his intent to veto the measures early on, so the passage by both GOP-led chambers of Congress was only symbolic.

The votes came before and during the United Nations’s major climate change conference in Paris, as an attempt to undermine Obama’s negotiating position toward an international climate pact.

Sen. James Inhofe James (Jim) Mountain InhofeChamber of Commerce endorses McSally for reelection Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Top admiral: 'No condition' where US should conduct nuclear test 'at this time' MORE (R-Okla.), chairman of the Environment and Public Works Committee and a vocal climate change doubter, said it’s important to send a message about congressional disapproval, even with Obama’s veto.

“While I fully expect these CRA resolutions to be vetoed, without the backing of the American people and the Congress, there will be no possibility of legislative resurrection once the courts render the final judgments on the president’s carbon mandates,” he said on the Senate floor shortly before the Senate’s action on the resolutions.

Twenty-seven states and various energy and business interests are suing the Obama administration to stop the existing plant rule, saying it violates the Clean Air Act and states’ constitutional rights.

They are seeking an immediate halt to the rule while it is litigated, something the Court of Appeals for the District of Columbia Circuit could decide on later this month.

All Republican candidates for the 2016 presidential election want to overturn the rules.

In addition to the veto, Obama is formally sending the resolutions back to the Senate to make clear his intent to disapprove of them.

Obama has now vetoed seven pieces of legislation, including five this year, the first year of his presidency with the GOP controlling both chambers of Congress.