The use of EU summits to frame political victories or defeats is an annoying habit.

One shouldn't pursue the wrong policies just because one is afraid of not being reelected. Those who intend to govern have to take responsibility for their countries and for Europe as a whole. This means, if need be, that they have to pursue the right policies, even if many voters think they are the wrong ones.

Between now and then, after 43 years of European marriage, the whole body of legislation will therefore have to be disentangled. That entails a whole range of specific and very complex questions: what will be the future legal status of the millions of EU citizens in the UK and the millions of Britons on the continent?

I am for it - not to make a threat, but to make clear that decisions that have been made are applicable law, even if you have voted against it. At issue here is European solidarity, which cannot be a one-way street. The traffic has to move in both directions.

Trump is a partner for us who cannot be easily categorized. Putting it in the noblest way possible, his understanding of politics is a little different from ours here in Europe. The way he acts forces us Europeans to take on a new responsibility. We are not standing with our backs up against the wall, but, to put it as pithily as the German chancellor has: We can no longer rely on the U.S. the way we could in the past.

Yesterday's shining heroes of Brexit have become the sorrowful heroes of today.

When it becomes serious, you have to lie.