European Union headquarters in Brussels, Belgium, Sept. 11, 2019 (AP photo by Virginia Mayo).

If the European Union were a country, it would have the second-largest GDP in the world, ahead of China and just behind the United States. But it has consistently struggled to leverage its economic heft into geopolitical clout, at times due to internal divisions among member states over strategic priorities, but also because of their reluctance to relinquish control over sensitive questions of foreign and defense policy to Brussels. The debate over whether the EU should embrace a global role, how it can do so and what role it should play if it does has taken on greater urgency in […]