…..Less than a week into the job, Grenell has already triggered headlines with his demand in a tweet that German companies in Iran should "wind down operations" immediately after Trump withdrew the United States from an international nuclear deal.
In the interview, Grenell maintained the hard line on Iran that has caused dismay in Europe's capitals, restating the U.S. government's position that Europe must re-impose sanctions on Iran.
"We expect our friends and allies to help us to bring Iran back to the negotiating table," he said, adding that the United States had proof Iran had violated its commitment not to enrich uranium.
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://www.cnbc.com/amp/2018/05/11/no-trade-war-with-germany-us-ambassador-richard-grenell-promises.html