President Donald Trump has said the Paris climate deal is unfair to the United States.

The Trump administration is reportedly on the verge of withdrawing from the Paris climate agreement, threatening to undermine a fragile accord and the nation’s status as a world leader even as the dangers of global warming grow.

The long-awaited decision on the landmark 2015 agreement, ratified by 144 parties around the world, could come as early as Tuesday.

Factions within the White House are warring over how to wriggle out of commitments to cut greenhouse-gas emissions as much as 28 percent below 2005 levels by 2025, with some arguing that the U.S. should simply modify the deal or ignore its nonbinding provisions. But the other group, led by White House chief strategist Steve Bannon and EPA administrator Scott Pruitt, are pushing hard for a complete exit, according to the New York Times and other publications.

That option “would have almost no upside for the United States, and lots of downside,” says David Victor, co-director of the Laboratory on International Law and Regulation at the University of California, San Diego. “We’re going to look back on the direction of foreign and economic policies of the Trump administration as a parade of self-inflicted wounds.”

Indeed, environmental groups, institutional investors, and hundreds of large businesses, notably including major players in the oil industry, have all urged the administration to stay in the deal.

The only apparent argument for exiting is a political one: throwing red meat to the nationalistic contingent of Trump supporters opposed to any international accords.

But the negative consequences of actually exiting, rather than just coming up short on voluntary emissions reduction targets, would be extensive and costly. Such a decision would inflict “gratuitous damage” on the United States’ relationships with critical allies and trading partners, including the European Union, India, and China, Victor says. It would also make it more likely that other countries would back out of the deal or shirk their pledges, weakening an accord that already doesn’t do enough to avoid dangerous levels of climate change.