U.S. President Donald Trump brought Armenian Prime Minister Nikol Pashinyan and Azerbaijani President Ilham Aliyev to the White House on 8 August, where the two South Caucasus neighbours signed a peace declaration aimed at ending more than three decades of intermittent conflict. Central to the accord is the creation of the Trump Route for International Peace and Prosperity (TRIPP), a roughly 20-mile corridor running across southern Armenia to link Azerbaijan with its Nakhchivan exclave and, via Turkey, wider export markets. The United States secured exclusive development rights to the route, and separate bilateral pacts with Yerevan and Baku cover cooperation in energy, trade, technology and security. Tehran, which borders the planned corridor, welcomed the cease-fire but swiftly signalled red lines. On 9 August, Ali Akbar Velayati, senior adviser to Supreme Leader Ayatollah Ali Khamenei, warned that Iran would block any U.S.-controlled passage "with or without Russia," describing the project as a potential threat to the region's security. Iran’s foreign ministry echoed the concern, cautioning that foreign military or commercial presence near its frontier could destabilise the South Caucasus. Turkey hailed the transit link as a boost for regional connectivity, while Russia called for solutions driven by countries of the region rather than outside powers. Diplomats say full implementation will hinge on Armenia removing constitutional references to Nagorno-Karabakh and on agreeing customs and security arrangements for the new route.