A divided Supreme Court on Tuesday abruptly halted President Obama’s controversial new power plant regulations, dealing a blow to the administration’s sweeping plan to address global warming.

In a 5-4 decision, the court halted enforcement of the plan until after legal challenges are resolved.

The surprising move is a victory for the coalition of 27 mostly Republican-led states and industry opponents that call the regulations “an unprecedented power grab.”

By temporarily freezing the rule the high court’s order signals that opponents have made a strong argument against the plan. A federal appeals court last month refused to put it on hold.

The court’s four liberal justices said they would have denied the request.

The plan aims to stave off the worst predicted impacts of climate change by reducing carbon dioxide emissions at existing power plants by about one-third by 2030.

“We disagree with the Supreme Court’s decision to stay the Clean Power Plan while litigation proceeds,” White House spokesman Josh Earnest said in a statement. Earnest said the administration’s plan is based on a strong legal and technical foundation, and gives the states time to develop cost-effective plans to reduce emissions. He also said the administration will continue to “take aggressive steps to make forward progress to reduce carbon emissions.”

Appellate arguments are set to begin June 2.