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.

We have to engage in a dialogue with Donald Trump because he is the elected president of the United States of America. But we have to emphatically oppose his foreign policy ideas.

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.

At the time, Jean-Claude [Juncker] was already an important man in Brussels. I was a young representative in the European Parliament. We talked for a long time and from that point on, our connection became increasingly deep. But our working-class origins are at least as important to our bond.

I believe the people should have the opportunity to have a greater influence on politics with their ideas. We need a new impulse for renewal.

Britain, Europe's second largest economy, a member of the G-7 and the UN Security Council, wants to leave the EU. That weakens us and it weakens Britain.

We have committed ourselves to pursue joint policies, but then national governments say, "We aren't bound by that." That is a dramatic situation, because solidarity is a basic principle that cannot be had on an à la carte basis. If we have rules that nobody adheres to, then the community will break apart.