US President Donald Trump has issued threats to Iran in an R-rated speech as his ultimatum to open the Strait of Hormuz comes to an end. 

He has said he will target Iran’s critical infrastructure if the strait is not reopened before Monday.

Jeffrey Price, senior fellow at the Foreign Policy Institute, John Hopkins School of Advanced International Studies, joined Andrew Dickens to chat about what to expect as this deadline rolls around.  

"President Trump is, known to be unpredictable - he's advertised, that his staff has advertised that as a virtue," Price said. 

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