Amid political developments in the United States and Israel, Tehran does not regard changes of government as a guarantee that confrontation will end, and it is preparing for the possibility that war could resume. A letter from JD Vance and Qatari mediation are described as signs of efforts to revive diplomacy. Still, disputes over the nuclear program, sanctions, a naval blockade and management of the Strait of Hormuz, together with mutual distrust, leave the prospect of a lasting agreement unclear.