US President Donald Trump's foreign policy does not follow conventional American diplomacy and it could get more erratic as elections appear around the corner.
The cancellations continue to mount as high-profile executives, organisations and media groups back out of Saudi Arabia's Future Investment Initiative conference after the murder of Saudi journalist Jamal Khashoggi.
Officials say President Trump could choose not to reimpose the sanctions that were eased under the nuclear deal but could slap other punishments on Iran, a pattern he has followed over the last year.
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