Trump said he was ending the exemption to close a loophole that allowed people to evade tariffs and funnel deadly synthetic opioids to the U.S. market. He said that the shipments were “killing Americans and hurting U.S. businesses,” but did not provide details.

The low-cost shipments were previously excluded from tariffs; President Trump said the loophole has allowed countries to avoid taxes and smuggle drugs into the U.S.

US President Donald Trump just dealt another blow to the embattled ecommerce industry, which is still reeling from sweeping tariffs Trump announced in the spring. On Wednesday, Trump signed an executive order widening the impact of those tariffs and making it more expensive for Americans to buy foreign products on sites like eBay,