Friedrich Merz, the leader of Germany’s centre-right Christian Democratic Union party (CDU), has a reputation for being blunt. On Sunday evening, as it became clear that the CDU had won the snap election triggered by the outgoing Social Democrat chancellor, Olaf Scholz, he did not disappoint. “For me,” said Mr Merz in a post-election television debate, “the absolute priority will be to strengthen Europe as quickly as possible so that, step by step, we can really achieve independence from the USA.” As recently as a fortnight ago, such a statement from a German chancellor-elect would have been inconceivable. But these...