Here in Brussels, we did everything to accommodate David Cameron's concerns. My collaborators and I personally spent countless days and nights negotiating an agreement that was fair toward the United Kingdom and toward the other 27 Member States. I was then very surprised to see that this settlement played no role whatsoever in the campaign in the United Kingdom. At the same time it is hardly surprising.

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

Angela Merkel did the right thing. Her decision and the extraordinary willingness of the German people to take in refugees conveyed an image of Germany that is still having positive repercussions today. Unfortunately, people in Germany are no longer seeing that.

We do not attract Russian money to Luxembourg with high interest rates.

In 1913 many believed that there would never again be a war in Europe. The great powers of the continent were so closely intertwined economically that the view was widespread that they could no longer afford to have military confrontations.

How will the exit affect thousands of British pensioners living in Portugal or Spain who will lose their access to the welfare and health systems? Fifty-three free-trade agreements, which were negotiated by the EU on behalf of all Member States, are also hanging in the balance for the UK.

I have no doubt that the U.S., even under Trump, will stick to the mutual defense commitment in the NATO treaty in the event of an emergency. Trump described NATO as being obsolete during his election campaign, but he made clear afterward that he considers the alliance to be an indispensable necessity.