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'm not a populist. But I try to present complicated issues in such a way that people know where I stand.

We need a common European tax policy that closes these tax loopholes. We need a common European social policy that prevents social dumping. We need an effective securing of our external borders and a smart way of fighting terrorism. Acting as a state within a national framework is no longer enough. The German chancellor has completely failed to convey that throughout her years in power. We need a re-start for Europe.

Donald Trump is not just a problem for the EU, but for the whole world.

The membership survey was a great moment for inner-party democracy. We can't go back, nor do we want to. Our members are pouring their hearts into this campaign. But people don't join the Social Democrats party just to put up posters. They join because they want to help steer the party.

It was clear to me that the White House's solemn atmosphere would not civilize Trump. But the merciless nepotism with which he conducts politics, in which he places himself and his family above the law, I wouldn't have considered that possible. And on top of that there is this reduction of complex political decisions to 140 characters. When it comes to a U.S. president, I consider the reduction of politics to a tweet to be truly dangerous. Trump is a risk to his country and the entire world.

It is courageous to occasionally admit that there are certain things one can't do.