Iran’s chief negotiator warned on Sunday the United States was not to be trusted, saying Tehran would not agree to any deal with Washington unless it fully secured Iranian rights. Mohammad Bagher Ghalibaf’s remarks came as reports emerged that US President Donald Trump had sent a tougher peace proposal back to Iran, and underlined the rift that the parties still need to close. Any tweaks to the draft could further delay an agreement to formally end the Middle East war and reopen the Strait of...