EU's Tusk says Brexit talks will be 'impossible' if emotions unchecked

Britain's looming negotiations with the European Union on exiting the bloc are already very tough and will become "impossible" if emotions are allowed to run unchecked, the chairman of EU summits said on Thursday.Donald Tusk's warning followed comments by Prime Minister Theresa May on Wednesday that some European politicians and officials were seeking to affect the outcome of Britain's election on June 8."These (Brexit) negotiations are difficult enough as they are.