I'm proud of the fact that Marine Le Pen in France insults me and Geert Wilders in the Netherlands calls me his opponent. The way I see it is, if these people weren't attacking me, I would be doing something wrong.

Ms. Merkel is avoiding retirement issues. She simply doesn't want to do anything, although she knows that doing nothing means that real pensions will fall. That is preprogrammed old-age poverty. When it comes to wage fairness: It was Ms. Merkel herself who blocked the establishment of a right to return to a fulltime job after going part time for a period. Yet everyone keeps saying that our platform is identical to that of the conservatives. It's crazy.

Politics is a dynamic process. When I was a young man in the 1970s, Yasser Arafat had just perpetrated various terrorist attacks. Just a few years later, after I had entered European Parliament, the same Yasser Arafat was given the Nobel Peace Prize.

CDU head Angela Merkel has tried for years to serve two sides: the conservative side by holding up her CDU party membership. But then at the same time she acts as though she were also a Social Democrat. I don't have this hydra-headed nature. In the end, people will vote for the Social Democratic original.

As a party of labor, the SPD must work together with the unions to ensure that people can make a living with their work. That is why I am not a proponent of the concept of unconditional basic income. I am, however, very much in favor of decent wage agreements, secure and lasting jobs, employee participation in decision-making and the examination of the social justification for claims and payments.

At the end of the day, men like Donald Trump need to be given that which they themselves dispense: clear messages. I would confront him as clearly and explicitly as possible. It is not only the right, but also the duty, of the leader of a German government to do that.

The stubborn stance of some European governments on the refugee question is a reprisal less aimed at Angela Merkel or (Vice Chancellor) Sigmar Gabriel than at certain people on Wilhelmstrasse in Berlin.