Trump threatened Sunday to resume military attacks on Iran unless Tehran restrains Hezbollah operations in Lebanon, even as Vice President Vance participated in face-to-face nuclear negotiations with Iranian officials in Switzerland. The threat came as negotiations over a ceasefire framework between Israel and Lebanon were underway, with discussions about pilot security zones and extensions around the Strait of Hormuz. The timing reveals sharp internal tension in the Trump administration's Iran strategy — simultaneous threats and negotiation — while Iranian negotiators have made ending the Lebanon conflict a precondition for further talks.