Canada’s federal election poses a stiff test for the governing Liberal Party, with implications for its global role on issues such as climate change.

A look at the post-9/11 war powers law that the Trump administration could use to justify conflict with Iran.

Vaccines are a major public health success story, but the COVID-19 pandemic underscores the many challenges involved in getting a vaccine to everyone who needs it.

The succession from Queen Elizabeth II to Charles could accelerate anti-monarchy movements in countries where the Crown is still head of state.

The Delta variant is driving new COVID-19 surges, even as countries around the world make gradual progress in vaccinating their populations. Five graphics show how the strain is taking over and who’s…