Economic growth will slow this year and next as the trade war hampers development in the United States and around the world, the Organization for Economic Cooperation and Development said.

The organization, comprised of 38 of the world’s most advanced economies, lowered its growth projections for the U.S. and the global economy for 2025 and 2026.

Donald Trump’s combative trade policies have tipped the world economy into a downturn clouded in heightened uncertainty, with the US among the hardest hit, the OECD said.