US prepares to leave Iran deal, even as talks with Europe continue 3/22/2018 7:29:11 PM   facebook Google+ ► Print US officials are taking a two-track approach to the Iran nuclear deal WASHINGTON (CNN) Mar 21, 2018  -- US officials are taking a two-track approach to the Iran nuclear deal, negotiating with allies to make changes demanded by President Donald Trump even as they prepare to walk away from the international agreement. Trump set a May 12 deadline -- the next date by which he has to waive sanctions against Iran or leave the deal -- for the US and its European allies to agree on changes to address what he sees as its flaws. The President's thinking, officials say, is that if the US and Europe are united on amending the deal, the other signatories -- Russia and China -- will come along, and Iran will have no choice but to comply.    A 'terrible' deal    European allies say they will not consider changes ...