I want to end tax dumping. States that have a common currency should not be engaged in tax competition. We need a minimum tax rate and a European finance minister, who would be responsible for closing the tax loopholes and getting rid of the tax havens inside and outside the EU. It is also clear that we have to reach common standards in our economic and labor policies. We cannot continue to just talk about technical details. We have to inspire enthusiasm in Germany for Europe.

In all of my speeches I talk about why a strong Europe is necessary in order for Germany to be strong over the long term. I think that I have sufficiently shown over the past years that I have a clear notion of how we can make Europe stronger, more democratic and more inclusive. There is really no competition there with Sigmar Gabriel.

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.

The construction of social housing and the attempt to support families seeking to buy their own homes are all projects from the 1960s and '70s. It all sounds old-fashioned, but it is actually completely modern.

I have friends in politics who really put the friendship to the test through their behavior.

We need a big debate in society about how we are going to shape Europe and tame capitalism. A government must provide direction and make concrete proposals. It is one of Angela Merkel's biggest failings that she doesn't do this.

Without new money, salaries won't be paid, the health system will stop functioning, the power network and public transport will break down, and they won't be able to import vital goods because nobody can pay.