Replacing the US nuclear guarantee with a French nuclear umbrella for Europe would face major political and logistical challenges. Nevertheless, given the growing un­certainty in Europe and Asia, the German government should consider scenarios and options that go beyond today’s deterrence...

The debate over major reforms of the European Union is heating up. Now that the one-year Conference on the Future of Europe has concluded, the European Parliament has proposed a convention and treaty amendments. But many national governments would still prefer to develop the European Union...