EU leaders push to boost global role of euro as US ties fray

As American and European policymakers know well, global currency dominance and exchange rate movement are different things. But there’s a decent argument that Europe’s push to widen euro usage necessarily involves some revaluation of the single currency.

As Transatlantic ties fray and European Commission President Ursula von der Leyen warned of lines that “cannot be uncrossed” after President Donald Trump’s bid for the US to acquire Greenland, European Union leaders and finance chiefs...