LUXEMBOURG (Reuters) - European Union foreign policy chief Federica Mogherini said on Monday she expected strong backing from EU foreign ministers for the 2015 nuclear deal between Iran and world powers that the U.S. President Donald Trump has repeatedly criticized.     It s an agreement that is working. It s an agreement that we need for our security, and I would expect from the ministers today a strong signal of European unity and its support and the full commitment to have it implemented by all sides,  Mogherini told reporters before a foreign ministers meeting in Luxembourg.  
EU foreign policy chief expects strong EU backing for Iran deal