President Trump's trade war is causing the global economy to slow, with growth now heading for its weakest pace since the COVID-19 pandemic, the OECD warned on Tuesday. The OECD cut its forecasts for most G20 economies and warned that easing trade tensions is key to boosting investment and keeping prices stable.

Some of the challenges are self-inflicted, but a fresh set of court rulings questioning the president’s authority to enact tariffs hangs over his trade agenda.

The White House's efforts to foster an agreement between Russia and Ukraine are also expected to continue this week, with a direct meeting expected on Monday in Turkey.