Three months of US efforts to tame Iran, and Donald Trump is in a bind - there's still no deal, and Iran has a stranglehold on the Straits of Hormuz. Oil price rises mean the cost of filling up the car is painful for many Americans, and that could spell trouble for the Republicans in the upcoming mid-term elections. But the US stock market is buoyant and Trump seem unperturbed - so is he far more in control of all this than he seems? Is he using 'madman theory' to keep his enemies guessing? Phil and Roger ask Dr James Boys, senior research fellow at UCL's Centre on US Politics, and author of \"US Grand Strategy and the Madman Theory\"
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