Transatlantic partnership has faced critical junctures before, but ‘this is the first time that all these tensions are occurring at the same time, with also the potential of dividing Europeans among themselves,’ says Missiroli,  former NATO assistant secretary-general With a number of unknowns at this stage, the main challenge for the EU is ‘to preserve its own internal unity,’ says Missiroli In case of further divisions, some countries in Europe might ‘start thinking that some degree of