The G20 Leaders’ Summit presents host India with a risk and an opportunity as it seeks to balance geopolitical tensions while trying to bolster its role as a voice for the Global South.

At 32 years old, Mercosur faces an existential crisis; Petro signals a big shift on drug policy; Massa’s last-ditch election spending will hobble the next government.

Each Friday, I look at what the presidential contenders are saying about foreign policy. Congress is empowered to set tariff policy, but it has delegated much of its authority to the president.