President Trump is keeping a campaign promise to exit the Paris climate change accords, a decision that suggests conservatives in the White House continue to hold strong sway with the president.

According to Axios:

Details on how the withdrawal will be executed are being worked out by a small team including EPA Administrator Scott Pruitt. They’re deciding on whether to initiate a full, formal withdrawal — which could take 3 years — or exit the underlying United Nations climate change treaty, which would be faster but more extreme.

Trump has apparently rejected the advice of moderates like Ivanka Trump, Jared Kushner, National Economic Council Director Gary Cohn, and Secretary of State Rex Tillerson. Steven Bannon, Pruitt, and others had argued forcefully that Trump needed to get out.

Trump’s decision is one of the most significant signs that he was serious about changing the way business is done in Washington, rejecting a treaty that members of the establishment on both sides of the aisle had embraced.

And it shows Trump is unaffected by criticism from German Chancellor Angela Merkel, who said after Trump’s visit last week to Europe that the continent would need to do more on its own, without America. In fact, given Trump’s propensity to push back, Merkel’s comments may well have cemented his decision.

UPDATE: Washington Post White House reporter Phil Rucker says, not so fast.