U.S.–Iran nuclear talks are set to resume in Oman amid sharp disagreements over the scope of negotiations, raising fresh doubts over whether diplomacy can hold as military tensions simmer. Tehran has drawn a firm red line, insisting talks focus strictly on its nuclear program, rejecting U.S. demands to include missiles and regional activities—an impasse that has alarmed Israel and frustrated Washington. With troop buildups, drone incidents, and maritime confrontations in the Gulf, critics question whether President Trump’s diplomacy is genuine outreach or a pressure tactic backed by force.