The crisis in the Middle East could undermine Ukraine’s ability to resist Russian aggression, the EU’s top diplomat warned Thursday.  High Representative Kaja Kallas told reporters as she headed into a virtual summit of EU foreign ministers and their counterparts in the Gulf that the Iran conflict had a “clear impact on the war in Ukraine,” namely by depleting global stockpiles of air defense capabilities, such as drone interceptors.   “There [are] defense capabilities that are needed in