From the newest Spiegel article:
The US President has his own relationship to facts, denies climate change and sees environmental protection as an industrial obstacle. Donald Trump's policy scares many scientists in the US. They are afraid of the attacks on universities, some even from a departure from rationality.
Thanks to the Brexit and Trump's choice, a lot more top scientists are interested in German universities. If foreign scientists leave the country, hopefully this will be a wake-up call for the US. On the other hand, Germany as a science location in Europe will benefit enormously.