In Yerevan, U.S. Vice President JD Vance dropped a careful hint that Donald Trump would personally decide the “red lines” in any deal with Iran. The remark came just days after quiet talks with Tehran and as questions about uranium enrichment and possible strikes hung in the air. Vance avoided detailing limits but stressed past efforts to reach a constructive deal. At the same time, Washington deepened nuclear and defense ties with Armenia. Was this a signal to Tehran or leverage before the next round?