If the Trump administration succeeds in securing citizenship data, the 2020 census could transform the way in which political power is distributed in the United States.

The attacks on the sprawling Saudi oil facility bear all the hallmarks of an Iranian operation, marking a dangerous new phase in Gulf tensions.

Iraq’s struggling economy and government corruption sparked the protests, in which hundreds have died. The governing elite appears shaky, and the stability of the country is at stake.

Fires in the Amazon have aroused international concern because of the rain forest’s outsize impact on climate, but political tensions are hampering the response.

The collapse of the Cold War–era nuclear arms treaty signals trouble for U.S.-Russia relations, European security, and nonproliferation efforts.