The Trump administration’s promise of an “economic D-Day” against Iran sounds like the announcement of a decisive final offensive. Yet the measures unveiled by US Treasury Secretary Scott Bessent are better understood as an ultimatum than as an economic rupture already achieved. Washington has expanded secondary sanctions targeting Iran’s digital assets, technology, gold, aviation and shipping sectors, while warning foreign governments and companies that continued trade with Tehran could cost them access to the US financial system. For the moment, however, the Trump administration has stopped short of immediately sanctioning Iran’s main economic partners.
This distinction is essential. Iran is already one of the most heavily sanctioned countries in the world. Decades of restrictions have weakened its economy, fueled inflation, eroded its currency and encouraged capital flight. The recent war, the naval blockade and the destruction of parts of its petrochemical and industrial infrastructure have intensified these structural problems. But adding more Iranian entities to US sanctions lists will not, by itself, produce the “total isolation” promised by Washington. The success or failure of Trump’s strategy will depend on whether the United States can force an actual economic break between Iran and the four countries that provide its principal lifelines: China, the UAE, Türkiye and Iraq.
This is where the Trump administration faces its greatest test. Iran is not a geographically isolated state that can easily be sealed off. It shares long land borders with Türkiye and Iraq and retains an indispensable market for its oil in China. Until recently, it also relied on extensive commercial and financial networks in the UAE, but Abu Dhabi has now suspended all trade, commercial exchange and financial transactions with Iran until further notice — a major blow to one of Tehran’s most important economic lifelines and an early, concrete success for Washington’s isolation strategy. Decades of sanctions have also produced an adaptable ecosystem of intermediaries, informal exchange mechanisms, front companies, cryptocurrency transactions and maritime evasion networks.
The United States therefore needs more than Treasury designations. It must persuade — or coerce — Tehran’s partners into accepting the political and economic costs of enforcing them. Iraq remains deeply connected to Iran through energy imports, trade, religious networks and political relationships. Türkiye regards cross-border commerce with Iran as both an economic interest and an instrument of regional autonomy. The UAE is a close US partner, but Dubai has long served as a vital commercial platform for Iranian businesses. China, meanwhile, has both the economic weight and the political motivation to resist US extraterritorial pressure.
Beijing is the pivotal actor. China’s response to the disruption of oil supplies caused by the Iran war has demonstrated that its vulnerability is less acute than Washington may have assumed. Years of diversification, the accumulation of large strategic stockpiles, the electrification of transport and reliance on domestic sources for electricity generation have enabled it to absorb one of the most severe oil-supply disruptions in recent history. This resilience should not be overstated. Current estimates suggest that China’s reserves could allow it to maintain this strategy for another five or six months, but the outlook becomes much less certain beyond that horizon. Stockpiles can cushion a shock; they cannot permanently substitute for normal import flows. A prolonged crisis would eventually confront Beijing with more difficult choices over consumption, industrial activity and the replenishment of its reserves.
China’s response has also had a paradoxical consequence for Iran. Beijing’s strategy has been guided primarily by its own economic interests: avoiding an oil-price shock and preventing a further slowdown at a time when the Chinese economy is already facing significant difficulties. It has drawn on reserves, restricted fuel exports and reduced purchases on global markets rather than competing aggressively for every available barrel. By helping to contain prices, this strategy has weakened Tehran’s ability to use the Strait of Hormuz as an instrument of coercion. Iran expected that disrupting one of the world’s most important energy corridors would produce a dramatic price surge, intensify inflationary pressure in the United States and force Trump to reconsider the war. Yet oil prices have not risen as much as Tehran might have hoped. China’s capacity to absorb the disruption has therefore indirectly reduced Iranian leverage over Washington — and even softened the domestic political costs of the conflict for Trump by limiting the increase in US fuel prices.
At the same time, China’s resilience also reduces Washington’s leverage over Beijing. To impose a genuine embargo on Iran, Trump would have to sanction Chinese banks, refineries, shipping companies and intermediaries, potentially risking a much broader financial and commercial confrontation. The question is not whether Washington possesses the technical capacity to do so. It clearly does. The question is whether Trump is willing to endanger other priorities in the US-China relationship and destabilize global markets to enforce a near-total embargo. Bessent’s remark that he did not want to “blow up the global financial system” exposes the contradiction at the heart of the policy: economic isolation can only be total if Washington is prepared to accept potentially systemic consequences.
Trump’s limited strategic options explain the return to economic warfare. Months of airstrikes and a naval blockade have neither overthrown the Iranian republic nor forced Tehran to accept US terms or fully reopen the Strait of Hormuz. Diplomacy has stalled, while another large-scale military campaign would be politically risky before the midterm elections. Economic pressure allows the Trump administration to demonstrate resolve without immediately escalating the direct confrontation. Yet this strategy could produce two radically different outcomes. In the first scenario, Iran’s leaders conclude that the economic trajectory has become unsustainable. If China, Türkiye, Iraq and the UAE significantly restrict trade and financial connections, the Iranian republic could face declining export revenues, shortages of foreign currency, worsening inflation and growing difficulties in funding the state and its security apparatus. The fear would not simply be economic hardship, which the leadership has repeatedly survived, but the possibility that hardship might evolve into systemic collapse.
Under those circumstances, Tehran could seek a compromise. The leadership would probably present negotiations not as capitulation but as a tactical necessity designed to preserve the state. Iran has previously shown that it can negotiate when pressure threatens core ruling interests. A credible offer combining sanctions relief with security guarantees and a realistic diplomatic framework might reinforce those within the Iranian leadership who argue that a limited agreement is preferable to indefinite economic strangulation. But coercion does not automatically produce moderation. The second scenario is that Iranian decision-makers interpret the economic campaign as the preparatory phase of another military confrontation. From Tehran’s perspective, the Trump administration may appear to be using the months before the midterm elections to weaken Iran economically, constrain its access to military technology and rebuild the political conditions for renewed military action afterward.
If that perception prevails, Iranian leaders may conclude that waiting is more dangerous than acting. They could intensify pressure in the Strait of Hormuz, attack US interests or regional states, accelerate sensitive nuclear activities, or seek other ways to demonstrate that strangling Iran will impose intolerable costs. Economic pressure intended to create bargaining leverage could then generate a preventive logic of escalation. The greater Tehran’s fear that the ultimate US objective is regime change, the weaker its incentive to make concessions that might leave it more vulnerable to a later attack. The decisive issue is therefore not the nominal severity of the sanctions but the political message accompanying them. Pressure without a credible diplomatic exit will strengthen Iranian “hardliners” who argue that Washington seeks surrender rather than compromise. Conversely, sanctions linked to clear, achievable demands and tangible incentives could affect the leadership’s calculations — especially if its remaining economic partners begin to distance themselves. Trump’s “endgame” remains uncertain because total economic isolation is not a policy Washington can implement alone. It depends on decisions made in Beijing, Ankara, Baghdad and Abu Dhabi, and on the price the United States is prepared to impose on governments that refuse to comply. If those economic relationships endure, the offensive will produce a chilling effect but not a hermetic blockade. If it is severed, the Iranian republic may face its gravest economic crisis. Even then, Washington cannot determine whether fear of collapse will lead Tehran to the negotiating table or convince its leaders that they must strike before the next phase of the war begins.
