Trump maximises leverage over Iran by squeezing where it hurts most - oil sales Leverage is the most important thing in negotiations, Donald Trump said in his book The Art Of The Deal.
Iran says its nuclear programme is for peaceful purposes but since Mr Trump reneged on the first Iranian nuclear deal it has been enriching uranium to levels that can have no civilian purpose.
Israel is likely then to attack Iran and Mr Trump has said without a deal the US is likely to support it.
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President Trump says he wants a deal with Iran.
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