"A series of recently announced trade policy measures will have implications for the economic outlook if sustained," the OECD said.

Trump introduced the tariffs to stimulate his own country's economy, but the OECD said they will damage it as well, with US GDP now expected to slump to 2.2 percent in 2025 and 1.6 percent in 2026 after it had been expected to stand at 2.4 percent this year and 2.1 percent next year.

The Organization for Economic Cooperation and Development on Monday downgraded its forecast for 2025 global growth by 0.2% to 3.1% due to mounting signs of weakness amid already slower growth and stic