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The security situation in the Persian Gulf slipped into direct and consecutive military engagements between the United States (US) and Iran over the past 48 hours, following almost two months of relative calm in warfighting terms. Following the downing of a US Apache helicopter, successive rounds of American airstrikes and Iranian missile barrages have strained what the Americans still like to call a ceasefire.

The immediate trigger for the latest escalation was the loss of the Apache over the Strait of Hormuz. Both pilots survived and were reportedly recovered within two hours after an uncrewed US Navy sea drone assisted in their extraction. The incident was followed by extensive American precision strikes against almost 20 military facilities across southern and western Iran, including targets in Bandar Abbas, Qeshm Island, and Jask. The strikes focused on radar systems, air defence infrastructure, and communications networks.

Iran responded through the Islamic Revolutionary Guard Corps with large-scale ballistic missile and drone attacks against 21 locations across the region. Major strikes reportedly targeted American military facilities in Jordan and Kuwait, temporarily disrupting operations at Kuwait International Airport. Additional attacks were directed against US Fifth Fleet facilities in Bahrain and Israeli airbases.

Iran has declared the Strait of Hormuz closed to commercial shipping and oil tankers. While oil has reacted modestly and was holding at a price of just over $93 per barrel of Brent, industry warnings are getting louder that global inventories are strained. Executives across the petroleum sector have cautioned that sustained supply disruptions could exhaust those inventories, triggering a sharp upward spike in oil prices, with some suggesting price levels reaching near $150.

Such developments would arrive at a politically sensitive moment for Washington.

The domestic political environment in the US is becoming an increasingly important factor in determining how long Washington can sustain its current strategy. Public opinion remains broadly opposed to the conflict. Polling indicates that only around a third of Americans approve of President Donald Trump's handling of the war. However, the more politically significant figure ahead of the midterm elections is that roughly two-thirds of Republican voters continue to support his management of the conflict.

However, data on Republicans' expectations of the war going forward suggest a risk that the relatively positive sentiment may shift.

Recent polling shows that a strong majority of Republicans believe Trump has handled negotiations effectively to end the war. At the same time, most Republicans now express a desire for the war to conclude. Whereas among Democrats, approximately 96% believe the US is effectively trapped in Iran and that the conflict could continue for a year or longer, among Republicans only around 20% hold the same view.

The administration’s midterm chances are hanging heavily on continued Republican confidence that the war is progressing successfully and that a negotiated outcome waits in the near term. If that confidence begins to weaken, the political position of the Republican Party heading into the midterm elections could deteriorate significantly.

Prediction markets are not showing encouraging signs. Expectations for a peace deal by the end of July stand at just 30%, rising to 68% by the end of December, which would, of course, be too late for the midterms.

If the bets are right, then broader economic indicators provide no comfort for Republican strategists.

The University of Michigan consumer sentiment index remains well below levels that parties holding congressional majorities typically prefer to see ahead of midterm contests. If oil executives are right in their warnings on inventories, then the sentiment position will only get worse.

That will steel Iranian resolve, as the prospect of dealing with a Democratic Congress is one the regime in Tehran would much prefer over that which it faces now.

Trump has expressed frustration in recent days that Iranian negotiators continue to shift positions and have not signed what he regards as a largely completed peace agreement. This frustration may reflect fundamentally different assumptions regarding the purpose of negotiations.

Within Western political and economic culture, negotiations are viewed as a mechanism for reaching a final and binding settlement that balances the interests of both parties and provides a framework for future stability. Within more revolutionary political cultures, that is not so. Rather than serving primarily as a pathway to final agreement, negotiations function as an additional “terrain of struggle” through which an opponent is weakened, delayed, and divided in order to secure a long-term advantage over them.

Iranian behaviour appears consistent with a strategy of calibrated escalation and delay. The pattern of limited provocations, retaliatory actions, and prolonged negotiations may be designed not only to secure concessions but also to widen differences between Washington and Jerusalem, for example, while simultaneously increasing uncertainty in global energy markets.

Adding another layer of complexity are reports circulating from Iranian sources that the current leadership may be approaching a point of political instability and that a more moderate faction could be waiting in the wings. Whether such claims are accurate is difficult to verify. However, the strategic effect of such rumours may be to encourage policymakers in Washington to remain engaged in the conflict for longer in the hope that internal political change in Tehran may be imminent. The net result is a series of incentives against rapid disengagement, even as the economic and political costs of continued involvement continue to rise.