President Trump took aim at Oman, a U.S. ally that has been mediating the talks, as efforts to end a war he started have faltered. The criticism comes as a temporary truce with Iran expires, leaving diplomatic options shrinking. Oman has served as a key intermediary in indirect negotiations between Washington and Tehran, facilitating discussions on nuclear limits and regional tensions.

Trump's public rebuke of the Gulf state signals frustration with the stalled process and raises questions about the viability of the mediation channel. The administration had previously praised Oman's role, making the sudden attack notable. With the truce lapsed, both sides face pressure to either extend talks or risk escalation.

Regional allies watch closely, concerned that the collapse of diplomacy could trigger broader conflict. The situation underscores the fragility of the diplomatic track and the limited leverage remaining.