The reality is that intergovernmental relations are not the strong point of federal systems generally. But some do it better than others.
Chancellor Angela Merkel wouldn't like to see Britain leave the EU, but a remain vote is not necessarily an easy option either.
Surely it isn’t too far-fetched to claim that if migrants are to promote democracy back home, it is beneficial for them to experience democratic values and principles in the countries hosting them.
Rule one: don't lose 'ownership' of the issue.
It's true that the establishment has been shaken, but immigration isn't the only reason voters are looking elsewhere.
Even if you don't have a word for it, you can make one up.
Probably no other country has struggled as hard to come to terms with its past as Germany. Here's what students contributed to that struggle.
Is Berlin’s underground scene in danger of going to the wall?
The world economy needs China, but Beijing has needs of its own. No wonder the leadership is putting so much effort into a year of negotiation.
Germany's oddly slapdash way of managing welfare for the elderly is pricking the bubble of economic stability.
Anti-migrant rhetoric is running high in the US – but its star proponent would do well to think about his German roots.
Is the debt designed to prevent another financial crisis turning on its creators?
How useful can new migrants be to corporations hoping to grow?
The violence in Cologne over New Year's Eve has undermined the "culture of welcome" so dear to Chancellor Angela Merkel. A European response is all the more urgent to face the populist threat.
The Nazis incarcerated, sterilised and denied statehoood to black people.
Germany has been a world leader in taking in refugees, but a xenophobic outcry at a wave of sexual assaults puts the government in a tight spot.
Through the Nazification of Christmas, the regime was able to gain the support of ordinary Germans.
"First, do no harm". It's not clear that European countries even got that right as they navigated their way through the aftermath.
Angela Merkel is entering her first proper war by joining the campaign against Islamic State.
The story of German migration to South Australia can highlight the experience of diverse communities, and what can happen to them in a time of serious conflict.