President Trump’s administration is locked in fierce debate over whether he should keep his campaign pledge to “cancel” U.S. involvement in the Paris climate change agreement, according to a new report.

Senior adviser Stephen Bannon is pushing Trump to abandon the landmark 2015 accord, The New York Times said Thursday, while Secretary of State Rex Tillerson and first daughter Ivanka Trump say such a move could have grave and widespread diplomatic repercussions.

The Times said people familiar with the White House’s debate over the climate pact say Trump wants a decision on the matter next week.

Trump is hoping to announce his plans for the Paris deal, they said, in conjunction with an executive order aimed at undoing many of former President Obama’s environmental regulations.

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The president plans on signing a directive next week aimed at starting the rollback of Obama’s regulations for cutting greenhouse pollution from coal-fired power plants.

The Paris agreement includes 194 nations, and all participants have formally submitted plans for how to lower carbon pollution within their borders.

Trump cannot unilaterally undo the legally ratified accord, but he could initiate a four-year process pulling the U.S. out of it.

The Times noted the Obama administration pledged the U.S. would reduce its carbon pollution about 26 percent from 2005 levels by 2025.

The Obama administration’s goal is largely dependent on its regulations on coal-fired power plants, meaning Trump’s push to weaken the restrictions may impede that objective.