Referendums have always posed a threat when it comes to EU policy, because EU policy is complicated. They're an opportunity for those from all political camps who like to oversimplify things.

Donald Trump is betraying everything that made America great: tolerance, democratic institutions and respect for the individual. In that sense, Trump is the most un-American U.S. president that the country has had in a long time.

It's not attractive at the moment to vouch for the European idea. I still do it, because I believe nothing would be better for our continent.

We are living through an epochal shift. If we aren't careful, the elementary foundations of our pluralistic democracy will be threatened.

Following the attacks in Paris, French President François Hollande has a completely different set of concerns. France needs more police, more security personnel and a greater emphasis on integration. He says that security is more important than the Stability Pact.

When a man ends up in the White House who boasts about not having a clue and who says that specialist knowledge is elite nonsense, then a critical point has been reached. Then you will have an obviously irresponsible man sitting in a position that requires the utmost degree of responsibility.

There are certain reactions that you aren't allowed to show in Berlin, for example that you feel offended. If you do, the best-case scenario is a sympathetic article along the lines of: Nice guy, but he's not up to it. The alternative is to don a suit of armor and become cynical. But that's not healthy either: Cynicism is the worst characteristic a politician can have. That's why you have to have an internal balance in Berlin, so you can stay true to yourself. And I have that.