OPINION: US President Donald Trump fails to realise that he'd be a lot closer to solving the Iran crisis if he kept his mouth shut just for one day, allowing negotiators to try and make gains

But how long can the impulsive, reactive president show restraint?

OPINION: US President Donald Trump fails to realise that he'd be a lot closer to solving the Iran crisis if he kept his mouth shut just for one day, allowing negotiators to try…