Iran war: Why US midterms could be a pivotal moment

As the United States and Iran exchanged attacks this week, one date was increasingly looming over the conflict.

The US midterm elections on November 3 could prove a pivotal moment in the war, as senior advisers to President Donald Trump seek to prevent the conflict from returning to all-out war before the polls when Republicans will be defending narrow majorities in both houses of Congress.

The push for restraint comes as Washington turns to economic pressure on Iran instead of military force. In August, the Trump administration announced its so-called “ Economic D-Day ”, imposing sanctions on 60 entities that it says facilitate oil revenues for trade with Iran and threatening other countries doing business with Tehran with secondary sanctions .

At the same time, the US naval blockade of Iranian ports in and around the Strait of Hormuz continues to exert pressure on Tehran’s oil exports.

Vice President JD Vance has meanwhile sought to downplay the war, which the US and Israel launched with attacks on Iran on February 28, as rising fuel prices and public opposition in the US threaten to become political liabilities for Republicans before the vote.

But there are clear limits to the restraint the Trump administration can show, with US forces continuing to strike Iran in recent days, and US leaders insist that further military action remains an option. Vance said this week that “everything that could happen is on the table,” including economic, military, diplomatic and covert pressure.

That leaves the coming two months as a particularly tricky period to navigate. Washington will want to avoid an all-out war while ratcheting up economic pressure, but Iran has its own calculations and could respond militarily anyway, potentially forcing the US into an escalation it would rather avoid before Americans go to the polls.

The midterms will determine whether the Republican Party can retain its narrow control of Congress. If the war escalates again before then, that could persuade more people to vote against the Trump administration.