Will the next US-Iran senior diplomatic meeting take place in the United States by December 31, 2026?

- [2026-06-22] The reference point for this market: US-Iran talks concluded in Switzerland with mediators reporting progress toward a roadmap for a final deal, as cited in the market description (Al Jazeera, https://www.aljazeera.com/news/2026/6/22/us-iran-agree-on-roadmap-towards-final-deal-in-switzerland-talks). - [2026-07-01] Following the Switzerland MOU, subsequent contacts were lower-level: US and Iranian officials were holding indirect, lower-level technical talks through Qatari and Pakistani mediators in Doha , which would likely not meet the "senior-level" threshold defined in the rules (CNN, https://www.cnn.com/2026/07/01/world/live-news/iran-war-trump). - [2026-09-22/23] The most recent and most significant development: Trump attended a multilateral meeting on the sidelines of the 81st UN General Assembly in New York with leaders and senior officials from Arab countries and Turkiye , and separately the United States and Iran engaged in hours of indirect talks through mediators on the sidelines of the United Nations General Assembly (UNGA) in New York (Al Jazeera, https://www.aljazeera.com/news/2026/9/23/us-iran-hold-mediated-unga-talks-on-ending-war-opening-strait-of-hormuz). - [2026-09-22] US envoy confirmed the format: US special envoy Steve Witkoff said mediators had "shuttled between" the American and Iranian delegations throughout Tuesday , describing it as "a round of discussions" that "we hope will prove constructive and promising," with mediators continuing their work (Al Jazeera, https://www.aljazeera.com/news/2026/9/23/us-iran-hold-mediated-unga-talks-on-ending-war-opening-strait-of-hormuz). - [2026-09-22] Trump gave a more direct account: Trump said Witkoff and Jared Kushner had held a three-hour meeting with Iranian officials, calling it "a very good meeting, a very productive meeting" , though the White House later clarified Trump himself had not attended and Witkoff/Kushner represented the US side (Al Jazeera; Inkl, https://www.inkl.com/news/witkoff-says-us-iran-talks-were-promising-constructive-as-iran-confirms-fm-aragchis-meeting-with-envoy). - [2026-09-23] Iranian state media confirmed participation of their foreign minister: Iranian state media confirmed that Foreign Minister Abbas Araghchi held a meeting with Witkoff, who was part of the US delegation present on the sidelines of the UN General Assembly , with the meeting held at Witkoff's request (Inkl, https://www.inkl.com/news/witkoff-says-us-iran-talks-were-promising-constructive-as-iran-confirms-fm-aragchis-meeting-with-envoy). - [2026-09-22] Qatar's PM/FM also participated, per Israel Hayom sourcing: the talks were held with Iranian Foreign Minister Abbas Araghchi and his team, had been arranged in advance and were attended for most of the session by Qatari Prime Minister and Foreign Minister Sheikh Mohammed bin Abdulrahman Al Thani (Israel Hayom, https://www.israelhayom.com/2026/09/22/witkoff-kushner-attended-us-iran-meeting-another-expected-soon/). - [2026-09-22] Trump signaled follow-up talks: Asked whether Witkoff and Kushner had taken part in the meeting, Trump replied: "They had a very good meeting, very productive meeting, and they have another one scheduled in the very near future." (Israel Hayom, https://www.israelhayom.com/2026/09/22/witkoff-kushner-attended-us-iran-meeting-another-expected-soon/). - [2026-09-23] Some ambiguity persists over the "direct" nature: Some Iranian state media had earlier reported that Araqchi and Witkoff had met, but Iranian officials clarified to Reuters that this was not face-to-face (US News/Reuters, https://www.usnews.com/news/world/articles/2026-09-23/hope-for-progress-after-us-iran-hold-first-shuttle-talks-in-months). - [~2026-09-24] Related Polymarket markets currently show: a "Where will the next US-Iran senior diplomatic meeting take place" market has "USA" at 44% and "No Meeting by December 31" at 41%, while a separate timing market "Next US-Iran senior diplomatic meeting by...?" shows "December 31, 2026" between 60-82% (varying by page snapshot) — indicating traders are not yet treating the Sept 22 New York encounter as a clean, resolved qualifying event, likely due to the indirect/"not face-to-face" ambiguity and possible dispute over whether it meets the rules' strict indirect-meeting criteria (Polymarket, https://polymarket.com/predictions/peace-deal; https://polymarket.com/predictions/trump-iran). - [2026-09-23] Broader diplomatic context: the indirect talks have been accompanied by a broader diplomatic effort involving the Gulf and other regional states, with Qatar working with Pakistan to reduce tensions between Washington and Tehran, safeguard freedom of navigation through the Strait of Hormuz and promote regional stability , suggesting future rounds could plausibly again be mediated in Doha or elsewhere rather than the US (Al Jazeera, https://www.aljazeera.com/news/2026/9/23/us-iran-hold-mediated-unga-talks-on-ending-war-opening-strait-of-hormuz). BOTTOM LINE: A qualifying senior-level, indirect (mediator-shuttled) US-Iran encounter involving Witkoff/Kushner and Iran's Foreign Minister Araghchi did occur in New York on 2026-09-22, physically located in the United States, and both sides describe follow-up talks as imminent — a genuinely strong data point for "Yes." However, live Polymarket pricing (USA ~44%, "no meeting" ~41%) shows the market itself is not treating this as a clean, already-resolved qualifying event, likely due to disputes over whether the encounter meets the rule's strict "same day, authorized intermediaries" indirect-meeting test versus being dismissed as UNGA-adjacent courtesy contact, and because future rounds may just as easily be hosted in Doha, Vienna, or elsewhere. NOT FOUND: No official/primary confirmation (e.g., State Department or Iranian MFA statement) explicitly labeling the Sept 22 New York encounter as satisfying this specific market's "indirect meeting" definition; no confirmed date/venue yet announced for the next round of talks after Sept 22-23; could not access the current live Polymarket page for the exact binary market in the prompt (blocked in the US region) to confirm the precise current "Yes" price.

- [2025-04-12] The first Trump-era US-Iran nuclear talks were held in Muscat, Oman, an indirect format mediated by Oman's foreign minister, with Foreign Minister Abbas Araghchi leading the Iranian delegation while Special Envoy Steve Witkoff headed the US team . https://www.aljazeera.com/amp/news/liveblog/2025/4/12/iran-us-talks-in-oman-live-delegations-to-hold-nuclear-discussions - [2025-04-15] Subsequent rounds were contested among third countries but never the US: Iran's Foreign Ministry initially confirmed the next round of negotiations between Iran and the United States will be held in Muscat, Oman, with the next round set for April 19 , before reports shifted the venue to Rome and later Oman again — illustrating a pattern of neutral third-country venues (Oman, Italy, Switzerland). https://www.globalsecurity.org/wmd/library/news/iran/2025/iran-250415-irna01.htm - [2026-02-06] A further round was held again in Oman, indirectly: Iranian Foreign Minister Abbas Araghchi held talks in Oman with US envoy Steve Witkoff and Jared Kushner, and the talks were indirect, with the Omanis acting as mediators . https://www.yahoo.com/news/articles/swiss-oman-host-us-iran-170609381.html - [2026-06-22] The most recent formal round prior to the question's baseline occurred in Switzerland, per the market's own background: "the first round of U.S.-Iran diplomatic talks in Switzerland concluded, with mediators reporting progress toward a roadmap for a final deal" (Al Jazeera, cited in Polymarket rules). - [2026-09-22] Breaking the historical pattern, a senior-level US-Iran encounter occurred on US soil for the first time: US special envoy Steve Witkoff and Iranian Foreign Minister Abbas Araqchi met in New York on September 22 following days of signals that US-Iranian talks would take place on the sidelines of the UN General Assembly... it came as little surprise when news broke that White House Special Representative Steve Witkoff and Iranian Foreign Minister Abbas Araqchi had met on September 22 . https://www.rferl.org/a/iran-us-meeting-araqchi-witkoff-hardliners/33862712.html - [2026-09-22] Trump himself confirmed a substantive session: President Donald Trump has told reporters at the UN that US officials had a "very good" three-hour meeting on Tuesday with the Iranian delegation at the UN General Assembly, and Iranian state media says Foreign Minister Abbas Araghchi and Steve Witkoff met in New York . https://www.aljazeera.com/news/liveblog/2026/9/22/iran-war-live-irgc-says-us-israel-must-accept-withdrawal-from-region?update=4973111 - [2026-09-22] Trump indicated momentum for a follow-up: "And they have another one scheduled in the very near future," Trump added , suggesting expectation of continued diplomatic contact into Q4 2026. https://www.cnn.com/2026/09/22/world/live-news/un-general-assembly-trump - [2026-09-27] A dedicated Polymarket market, "Where will the next US-Iran senior diplomatic meeting take place...?", currently prices "USA" at roughly 30-38%, implying traders see the US as a plausible but not-favored venue for the *next* round after the Sept 22 New York contact, with other venues (Oman, Qatar, Switzerland) splitting the remainder. https://polymarket.com/predictions/russia-us-relations - [2026-09-27] The directly relevant date-based market, "Next US-Iran senior diplomatic meeting by...?", prices the "December 31, 2026" outcome (any senior meeting, any location, occurring by year-end) at roughly 68-72%, versus only ~27-28% for a meeting by September 30 and ~51-52% by October 31 — reflecting expectation that another senior round is more likely than not by year-end but timing remains uncertain. https://polymarket.com/event/next-us-iran-senior-diplomatic-meeting-byptptpt - [2026-09-22] A related, now-resolved Polymarket market ("Where will the next round of US-Iran peace talks be...?", resolving by Sept 30) settled on "USA" at 100%, confirming that market participants and resolvers treated the September 22 New York/UNGA sideline meeting as satisfying a "next round" criterion — the first time a US-based outcome won such a market after roughly 18 months of rounds held exclusively in Oman, Italy attempts, and Switzerland. https://polymarket.com/event/where-will-the-next-next-round-of-us-iran-peace-talks-beptptpt-20260623023740663 - [2025-04-14 to 2025-04-15] Historical pattern shows repeated venue disputes resolved toward neutral mediator states rather than either capital: talks between Iran and the United States over Tehran's rapidly developing nuclear programme seemed set to depart the Middle East, as diplomatic sources announced that the Italian government had given the go-ahead to hold the next round of negotiations , following the pattern of always choosing a third-party country over Washington or Tehran. https://www.euronews.com/2025/04/14/next-round-of-iran-us-nuclear-talks-to-be-held-in-rome-diplomatic-sources-say BOTTOM LINE: Every prior round of US-Iran diplomacy since talks resumed in 2025 (Oman ×3+, Italy/Rome attempt, Switzerland) was held in a neutral third country, and formal in-capital talks in the US were essentially a null base rate — until September 22, 2026, when a senior meeting occurred on US soil for the first time, on the sidelines of UNGA in New York. Base-rate history therefore argues against the US as the default venue, but the just-broken precedent plus current market pricing (~30-38% "USA" for the next round, ~68-72% for any senior meeting by Dec 31 regardless of venue) suggests a meaningful, non-trivial chance of a further US-based meeting by year-end, even though a non-US neutral venue remains the modal outcome. NOT FOUND: No systematic historical dataset or academic study quantifying base rates for diplomatic meeting venues in adversarial-state negotiations generally (e.g., North Korea, Cuba talks) was located; also could not confirm any official US or Iranian government statement (beyond envoy/state-media reports) committing to a specific venue for the next round after September 22, 2026.

- [2026-09-22] The precedent-breaking data point: after roughly 18 months of every US-Iran round being held in a neutral third country, Iranian Foreign Minister Abbas Araqchi arrived at UN Headquarters in New York on September 22, and it came as little surprise when Witkoff and Araqchi met that day , confirming the US hosted a qualifying-level encounter for the first time since talks resumed. - [2026-09-22] The session was substantive, not a courtesy call: the three-hour discussions came after Trump's UNGA speech weighed a deal versus "annihilate them," with Araghchi representing Tehran and Witkoff and Kushner representing Washington , and Qatar was among the mediators facilitating communication between the two sides per Iran's foreign ministry . - [2026-09-22] Trump publicly signaled momentum for a near-term repeat, telling reporters "They had a very good meeting, very productive meeting, and they have another one scheduled in the very near future" (per Israel Hayom, cited in prior research) — a direct assertion by the sitting president of a scheduled follow-on. - [2026-09-23] Evidence of a live, continuing NY-based channel: Iran presented the US with a road map to end their conflict, sources told The National a day after US and Iranian officials held talks on the sidelines of the UN General Assembly in New York , and Trump was hoping representatives of the two sides would meet in Oman, possibly Salalah, later that month to start a reconciliation process — showing US officials were simultaneously discussing both a US-based continuation and a subsequent Oman round, i.e., New York was treated as a live, ongoing venue rather than a one-off. - [2026-09-23] A second round was actively anticipated in the same city: a second round of talks was likely to be held later on Wednesday, according to sources briefed by mediators , indicating the mediator-shuttle format begun in New York was expected to continue there within the same UNGA week (through Sept 29). - [2026-09-25] The diplomatic channel remained active from New York days later: Iran sent Washington a new proposal via intermediaries while Araghchi was on the sidelines of the UN General Assembly, presenting a seven-day roadmap to end the war that Iran said it would implement if Washington accepted it — confirming Iranian senior officials stayed engaged with US channels in New York through the end of that week rather than the contact being a single isolated event. - [2026-09-25] Trump himself confirmed via the White House that talks with Iran continued to be live and were being weighed directly by him: the plan, announced at the UN General Assembly, calls for the US to release frozen Iranian funds, lift oil sanctions and end its naval blockade, with negotiations on a final agreement to begin by the seventh day if steps were completed within four or five days . - [2026-09-22] Precedent for using UN gatherings in New York as a working diplomatic venue for the Trump administration's envoys already exists beyond Iran: Witkoff has repeatedly used UNGA week in New York for senior mediator-facilitated talks (e.g., Ukraine-Russia channel in August 2025), showing an established operational pattern of the US using its home turf/UN host-country status for high-stakes shuttle diplomacy that could recur if another UN-linked or ad hoc gathering arises before Dec 31. - [2026-09-26] Despite Trump's rejection of Iran's specific roadmap on Sept 26, the underlying channel was not severed: Araghchi said Iran formally submitted the roadmap via Qatar and was awaiting Washington's response, and separately Pezeshkian said Iran no longer trusts negotiations with the US after previous rounds were followed by attacks and sanctions — a rhetorical setback but not a formal termination of contacts, leaving the door open to further US-hosted or mediator-facilitated meetings later in the year, especially if Witkoff/Kushner reinitiate contact as they did in September. - [2026-09-24] The rupture is domestic-political, not logistical: Iranian hardliner backlash (IRGC-aligned media accusing Araghchi of an "unauthorised" meeting) targets the legitimacy of engaging Washington at all, but does not indicate any US-side reluctance to host further rounds — the constraint is on the Iranian side's internal cohesion, not on US venue availability, meaning if Tehran's leadership authorizes further contact, New York/Washington remains a demonstrated, logistically fine venue. - [2026-09-27] Related Polymarket sub-markets (per prior research) price "USA" as the leading single-country outcome (~30-44% depending on snapshot) for where the next senior meeting occurs, and price a senior meeting occurring anywhere by Dec 31 at roughly 68-72% — reflecting that traders view a repeat US-based meeting as the single most-likely specific outcome even though it is not yet a majority certainty. BOTTOM LINE: The single most likely path to "Yes" is a repeat of the September 22 mechanism: Witkoff/Kushner-led, mediator-shuttled (Qatar/Pakistan/Egypt) indirect talks with Araghchi (or another qualifying Iranian official) held opportunistically in New York/Washington whenever both sides' senior envoys are next simultaneously present in the US — a channel that stayed active through at least September 26 despite Trump's rejection of Iran's specific roadmap, and which already broke the 18-month "always neutral third country" pattern once, with Trump personally asserting another session was "scheduled in the very near future." NOT FOUND: No confirmed date, venue, or official announcement for any specific US-Iran senior meeting after September 26, 2026; no primary US State Department or Iranian Foreign Ministry statement locking in a location (Oman/Salalah vs. a repeat US venue) for the next round.

- **[2026-09-24]** Iranian lawmakers have moved a formal parliamentary impeachment motion against Foreign Minister Araghchi, with a National Security and Foreign Policy Commission member stating "Members of parliament have registered the impeachment of Araghchi and are pursuing it," after Tasnim reported the Witkoff/Kushner encounter was conducted without Supreme National Security Council approval. https://www.theweek.in/news/middle-east/2026/09/24/tehran-in-turmoil-why-irans-foreign-minister-could-lose-his-job.html - **[2026-09-24]** Supreme National Security Council Secretary Mohsen Rezaei signaled in a TV interview that Araghchi was only authorized to retransmit Iran's seven conditions via mediators, "indirectly indicat[ing] that permission was not given to deviate from this and have direct contact with Witkoff" — meaning Tehran's own security apparatus disputes the legitimacy of the New York encounter. https://www.theweek.in/news/middle-east/2026/09/24/tehran-in-turmoil-why-irans-foreign-minister-could-lose-his-job.html - **[2026-09-23]** Iran's own envoy publicly downplayed the encounter as not qualifying as "talks": a spokesperson for Iran's Foreign Ministry said Iran had maintained its negotiating stance in talks with U.S. officials on the sidelines of the U.N. General Assembly, demanding the United States end its blockade on Iranian ports and release Iran's frozen assets , framing the encounter as continuity of mediator-relay rather than a new senior meeting. - **[2026-09-23]** US envoy Witkoff himself contradicted Trump's "meeting" framing: Witkoff said US talks with Iran at the United Nations General Assembly were conducted through mediators, clarifying that the two sides did not hold direct discussions, writing "we engaged in lengthy talks with the Iranian delegation through the mediators, who shuttled between the two sides throughout the day" , undercutting the claim that a clean, unambiguous qualifying meeting occurred in the US. - **[2026-09-23]** State-aligned outlets went further than mere criticism: Tasnim News Agency published an op-ed rejecting official explanations for the meeting and demanding an apology from the Foreign Minister, arguing Tehran's conditions had already been communicated through intermediaries, leaving no justification for direct contact with Witkoff , indicating an institutional push within Iran against repeating any in-person/on-US-soil format. - **[2026-09-24]** Backlash extended beyond parliament to social media hardliners: one user charged that the meeting was "an even bigger mistake" than Pezeshkian traveling to the US for the UN General Assembly , illustrating domestic political cost attached specifically to appearing on American soil. - **[2026-09-25]** Secretary of State Rubio signaled a slow, non-imminent process rather than a firm next round: "If there's going to be a deal with Iran…it's going to involve a lot of hard work over a period of time, and it will engage and involve mediators as well," Secretary of State Marco Rubio told reporters this week — consistent with continued indirect, mediator-based format (as in Oman/Qatar) rather than a swift US-based follow-up. - **[2026-09-27]** As of the latest reporting, Araghchi is still describing the process as indirect and conditions-based rather than confirming any concrete next meeting or venue: "Our conditions are clear; any progress toward the opening of the Strait of Hormuz is contingent upon the fulfillment of these conditions, and we will not back down from them," Araghchi said, adding "During our meetings with mediators, these conditions were fully conveyed, explained, and elaborated upon, and the mediators, in turn, relayed them to the American side" — no date, format, or country for a next senior encounter has been fixed. - **[2026-09-27]** Trump separately confirmed no breakthrough: Trump told reporters Saturday that he has rejected Iran's latest conditional proposal for reopening the Strait of Hormuz , suggesting the diplomatic track may stall rather than progress toward a follow-up meeting soon, in the US or elsewhere. - **[Historical pattern, through 2026-02]** Every prior senior round (Oman ×3+, Rome, Switzerland) was hosted by a neutral third country at Iran's insistence on "calm atmosphere" and mutually agreeable venues, and even venue confirmations were repeatedly walked back or denied by Tehran's Foreign Ministry as "media speculation" until the last moment (globalsecurity.org/IRNA, May 2025) — a structural pattern of Iran resisting US-hosted or US-initiated framing that predates and could reassert itself after the September 22 anomaly. - **[2026-07/08]** Iran's Foreign Ministry has twice this year flatly denied Trump's claims of active negotiations — Baghaei said there are "no negotiations with the United States at present" in July, and "We are not currently negotiating with the United States. Our negotiations are with Oman to secure passage through the Strait of Hormuz," said foreign ministry spokesman Esmaeil Baqaei in August — demonstrating a recurring pattern of Tehran publicly contradicting or downplaying US claims of engagement, which could recur regarding any future US-based meeting claim. BOTTOM LINE: The strongest case for NO rests not on venue preference alone but on the fragility and contested nature of the September 22 New York encounter itself — Iran's own security establishment, parliament, and state media are actively disputing its legitimacy and pushing back against any repeat of an in-person/US-soil format, while both sides (Witkoff himself, and Iran's Foreign Ministry) have downplayed it as indirect/mediator-relayed rather than a clean senior meeting, and Rubio/Trump signals suggest the next steps will likely continue through the established indirect, third-country mediator channel (Oman/Qatar) rather than a fresh direct convening on US soil. NOT FOUND: No official Iranian government statement ruling out future US-hosted talks explicitly; no confirmed outcome of the parliamentary impeachment motion against Araghchi; no announced date or venue for any next round as of September 27, 2026.