France’s President Emmanuel Macron staged an impressive return to the world stage using the reopening of Notre Dame Cathedral as an opportunity to broker talks between Ukraine’s Volodymyr Zelenskyy and US President-elect Donald Trump against a backdrop that eclipsed other European leaders. The ceremony came at the end of a challenging week for the French president, after the collapse of the government, which left the country rudderless. Two days before the ceremony Macron was vowing to...