Massive US military deployment in the Middle East includes 50,000 troops, F-35s and Marines to pressure Tehran.

The United States is deploying a third US aircraft carrier to the waters around Iran, a US official told Al Jazeera, as the war enters its eighth month and both sides weigh escalation and diplomatic engagement.

The official told Al Jazeera that the USS Theodore Roosevelt carrier strike group left its San Diego base on Sunday, bound for the region, followed a day later by the Makin Island Marine Expeditionary Force, carrying more than 2,000 Marines.

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By the end of November, the official said, three aircraft carriers and two amphibious landing groups will be positioned around Iran.

The official said the concentration of force would hand President Donald Trump a wider menu of options if he decides to act.

Al Jazeera’s Tanya Noury, reporting from Washington, said the new deployment includes thousands of troops and extra air power, including F-35 fighter jets, layered on top of the roughly 50,000 US service members already stationed in the region.

The goal, Noury said, citing sources inside the Pentagon and White House, is to keep military options “on the table” for Trump regardless of how diplomacy unfolds, with the Pentagon not planning to withdraw any assets even if an agreement with Iran is reached. Defense Secretary Pete Hegseth has said forces are “ready to go” should Trump order new strikes.

Trump himself has kept the threat alive in public. He told Fox News he believes the US is “going to win the war” with Iran “very soon”, while suggesting in other remarks that a return to military action “is possible” but something he would rather not spell out before November’s midterm elections.

Washington has paired the show of force with new economic pressure, sanctioning Iran’s rail and automotive conglomerates this week, as the Treasury Department called the new measures an effort to drain what remains of Tehran’s revenue.

Diplomatic track

Parallel to the military build-up, Iran has pushed a seven-day roadmap, conveyed through Qatar, that would see it reopen the Strait of Hormuz and resume nuclear talks in exchange for an end to the US naval blockade, sanctions relief and a regional ceasefire covering Lebanon and Yemen.

The plan was then rejected by Trump.

US Ambassador to the UN Mike Waltz told NBC the plan’s demand for frozen funds and sanctions relief was non-negotiable, noting “these aren’t just the United States’ sanctions … these are global sanctions”, and pointing to seven UN Security Council resolutions against an Iranian nuclear weapons programme.

Iran’s response, in the meantime, has been similarly two-pronged.

Foreign Minister Abbas Araghchi told NBC that Tehran was “fully prepared” to resume the war, before writing on X that “we did not come to New York to sell a war. We came to forge peace.”

Analysts say the mixed signals are deliberate.

Abas Aslani of the Center for Middle East Strategic Studies said the dispute has shifted from whether to negotiate to “who is going to abandon the primary leverage first”, while former US ambassador Richard Schmierer said Trump is caught between delaying past the midterms and the political cost of offering concessions that mirror a June deal he was already criticised for.

Nearly 70 percent of Americans now say the war has not been worth fighting, according to a new AP-NORC poll, with Trump brushing off the slide in his approval ratings by insisting “the pollsters are corrupt”.