“Donald Trump is the first US President since World War Two to challenge the role that his country set for itself many decades ago. And he is doing this in such a way that, to many, the old world order appears to be over - and the new world order has yet to take shape.

The question is, which nations will step forward? And, with the security of Europe under greater strain than at any time almost in living memory, can its leaders, who are currently scrabbling around, find an adequate response?”