Donald Trump gives orders to ‘substantially increase’ sanctions on Iran Ghana Broadcasting Corporation 5 years ago Donald Trump says he has instructed the US Treasury Secretary to substantially increase sanctions on Iran. Saudi Arabia says it has proof Iran is behind drone attacksDateSeptember 19, 2019In relation toWorldUS to impose “major” sanctions on Iran amid tensionsDateJune 23, 2019In relation toNewsUS announces return of all pre-nuclear deal sanctions on IranDateNovember 2, 2018In relation toWorld