China Rejects Trump’s 25 % Tariff Threat Over Iran Trade

Washington’s attempt to police third-party commerce through punitive tariffs echoes the 1996 Helms-Burton Act sanctions on Cuba and the 2018–2019 US-China tariff volley, both of which triggered allied push-back and WTO challenges. Trump’s threat widens the long-running use of secondary sanctions—tools the US has honed since the 1950 UN embargo on North Korea—signaling further bifurcation of global trade blocs and accelerating de-dollarisation efforts already underway after the 2022 Russian sanctions. Whether Beijing capitulates or counters, the episode matters because it tests the limits of US leverage when over 18 % of world goods now move through Chinese supply chains; over a century, such tariff brinkmanship either cements hegemonic control (as Britain’s Navigation Acts briefly did in the 17th century) or hastens alternative systems, as Smoot-Hawley’s 1930 tariff spurred. This moment therefore sits at the inflection point of a potential re-ordering of global trade norms rather than a mere bilateral spat.