China hits back with export controls, Canada and Mexico remain under threat. USPS closes then reopens "de minimis" small package loophole

During his first term in 2018, Trump initiated a brutal two-year trade war with China over its massive US trade surplus, with tit-for-tat tariffs on hundreds of billions of dollars worth of goods upending global supply chains and damaging the world economy.

Ending tariff exemptions on low-cost packages from China has broad bipartisan support in Washington, and Trump pulled the plug when he raised tariffs on Chinese goods by 10% earlier this week. Goods sent through duty-free packages became subject not only to existing tariffs — 25% for many Chinese products — but also the new 10%.