As Donald Trump’s tariffs have upended global trade, the legal basis for his use of sweeping emergency powers has been contested in the courts. Yesterday an appellate court upheld a recent ruling that Mr Trump cannot single-handedly rejig America’s tariff schedules. Mr Trump was not pleased. Read our analysis of the case, which will ultimately end up before the Supreme Court. 

Problems have long been brewing in New Orleans. It first flooded in 1719, one year after it was founded by French colonists. A more recent disaster, Hurricane Katrina, still looms over the city. Twenty years on, New Orleans remains as defiant—and precarious—as ever. The city is fighting an unending battle against the swampland on which it was built. How long can it carry on?