The United States doubled tariffs on steel and aluminium imports on Wednesday, activating a hike in the duties on the imported metals to 50% from the 25% rate introduced in March. The day also marks the Trump administration’s deadline for trading partners to submit their “best offers” to avoid further steep import duties set to take effect in early July.

Most of President Trump’s tariffs were halted late Wednesday by a U.S. trade court in a sharp rebuke of the president’s signature trade war policy.