By Samia NakhoulBEIRUT, June 18 (Reuters) - The U.S.-Iran agreement — the first signed by an American and an Iranian president since Iran's 1979 Islamic Revolution — is being hailed by its backers as the deal of the century. But for Tehran's adversaries across the Middle East — from Israel to Gulf states and factions in Lebanon — it looks more like the curse of the century: an accord that could leave Iran more secure, more legitimate and ultimately more influential.

The deal may halt the fighting, but it leaves Iran’s nuclear and missile programs unresolved, with Tehran intact, Gulf states exposed and confidence in US protection badly shaken

Hints of unresolved issues as Iran and Trump differ over Strait of Hormuz

A landmark U.S.-Iran interim deal, signed by Presidents Trump and Pezeshkian, ends a three-month war and extends a ceasefire. While hailed as a "deal of the century" by…

When the United States and Israel struck Iran in February, plunging the Middle East into one of its most dangerous crises in decades, the objective was clear: cripple Tehran's…