China and Russia have expanded trade and defense ties over the past decade, but they’re not formal allies. Experts say Russia’s war in Ukraine could be a turning point in the relationship.

China is North Korea’s biggest trade partner and has leverage over Kim Jong-un’s regime, yet its policies focus more on border stability than nuclear threat.

Taiwan has the potential to be a flash point in U.S.-China relations. U.S. House Speaker Nancy Pelosi’s trip to Taipei in 2022 heightened tensions.

Opioid addiction has become one of the United States’ biggest killers, endangering public health, the economy, and national security. But closing the floodgates on fentanyl poses a significant foreig…

Yemen’s internal divisions and a Saudi-led military intervention have spawned an intractable political, military, and humanitarian crisis.

For more than two decades, China has developed close economic and security ties with many Latin American countries, including Brazil and Venezuela. But Beijing’s growing sway in the region has raised…

The United States’ withdrawal from the arms control agreement has heightened tensions and left the remaining signatories scrambling to keep the deal alive.

Trade between the world’s two biggest economies has ballooned in recent decades, bringing significant benefits but also perils that have led to calls to rethink the relationship.