Donald Trump announced he will impose an additional 100% tariff on goods from China, on top of the 30% tariffs already in effect, starting November 1 or sooner. The threat is a massive escalation after months of a trade truce between the two nations.

Trump’s announcement is tied to Beijing ramping up export controls on its critical rare earths, which are needed to produce many electronics. As a result, Trump appeared to call off a meeting with Chinese President Xi Jinping that was scheduled for later this month in South Korea.