Didn't the US and Israel gather intelligence during previous "talks" which ended up with senior Iranian leadership dead? It seems unlikely that this relationship would be fixed by now, and a deal would require big concessions from one side... of which one is polling real badly at home currently.

Between the threats to NATO allies, high oil prices, lifting of sanctions on Russian oil, US personnel losing their lives, military equipment losses, and broken campaign promises... I don't think this is something you just walk away from. It's still not clear why we're there in the first place; one could speculate that Trump was convinced by Israel that this operation would be like Venezuela which seems plausible because no US intelligence agencies backup the notion that Iran was developing or trying to develop nuclear weapons.