Gideon Rachman: “A conflict with Iran that started with vague war aims now has one clear and overriding objective: reopen the Strait of Hormuz. Ironically and infuriatingly, the only reason the strait is closed is because the US and Israel went to war in the first place.”“It is not in Trump’s power to reopen this vital sea passage by declaring victory and walking away. Instead his war with Iran — and the particular issue of the Strait of Hormuz — will define the rest of his presidency and may haunt his successors.”