You have to let the people vote when it comes to a new constitution.

The question of societal fairness is always pertinent.

Keeping quiet and letting the others do the talking. That may be Angela Merkel's method, but it's not mine.

Things are going well in Germany because the economy is booming and as an export-driven nation, we are profiting from the fact that we have an excellent, high-performing SME sector. But if we want things to continue to go well into the future, then we have to break up the antiquated structures in some areas and really modernize.

Imagine a German as president of the European Commission. If he or she goes to some particular country and says do this or that, it won't be very well received. The president quickly ends up being the evil German. But if the president is elected by and controlled by 700 representatives from all EU countries, that legitimizes him or her in a very different way.

Donald Trump is withdrawing from the Paris climate agreement because he wants to lower environmental standards for American products and manufacture more cheaply. His reasoning is quite simple, but very shortsighted. It won't succeed because, by doing so, Trump is missing a golden opportunity to modernize American industry.

I spoke with Gerhard Schröder about a lot of things, including foreign policy. Schröder knows how important European policy is to me personally. I have worked together with Angela Merkel on European policy for many years, so I was surprised when Volker Kauder who has little experience in European policy, claimed that I had not represented German interests in Europe. That's an example of how the conservatives conduct an election campaign.