U.S. tariff threat spikes

President Donald Trump has reopened trade brinkmanship, threatening a new 50% tariff on Chinese imports and ordering a U.S. naval blockade of traffic to and from Iranian ports. (cnbc.com) (reuters.com) Trump said on April 8, 2025, that he would add a 50% duty on Chinese goods if Beijing did not withdraw its planned 34% tariff on United States products by April 9. China’s Commerce Ministry said it would “fight to the end” and called the threat a “mistake on top of a mistake.” (cnbc.com) On April 12, 2026, United States Central Command said it would begin enforcing a blockade on “all maritime traffic entering and exiting Iranian ports” at 10 a.m. Eastern time on April 13. Reuters reported the order followed failed talks tied to the war with Iran, while the New York Times said United States forces would not stop ships merely transiting the Strait of Hormuz. (reuters.com) (nytimes.com) The tariff threat and the Iran shipping order hit two separate arteries of trade at once: customs duties on goods at the border and tanker and cargo flows at sea. The Strait of Hormuz is the narrow waterway used by Gulf exporters, but the announced blockade language targeted ships bound for Iranian ports rather than every vessel crossing the strait. (reuters.com) (nytimes.com) The trade picture is also noisier because the administration has carved out product exceptions even while talking tough on tariffs. On April 11, 2025, a presidential memorandum and customs guidance excluded smartphones, computers, semiconductors and other electronics from the new reciprocal tariffs, with retroactive effect to April 5. (ey.com) (politico.com) That exemptions list fueled criticism that the policy was shifting faster than importers could plan around it. CNBC, NBC News and customs advisers all reported that officials described some exclusions as temporary or subject to later revision, leaving companies to watch tariff codes and White House orders line by line. (youtube.com) (nbcnews.com) (troutman.com) The administration has also been revising other tariff programs in 2026. On April 2, the White House said it was strengthening Section 232 tariffs on steel, aluminum and copper imports, and Reuters reported the plan would keep a 50% rate on basic steel and aluminum while lowering some derivative-product rates. (whitehouse.gov) (reuters.com) For importers, shippers and commodity traders, the immediate question is not ideology but timing: which goods face which rate, and which ships can still move. By Monday, April 13, 2026, both answers depended on fast-changing orders from Washington rather than settled trade rules. (reuters.com) (whitehouse.gov)