The United Nations’ top leadership position has broad authority to steer the organization’s agenda, but its impact has varied widely since 1946.

Comprehensive immigration reform has eluded Congress for years. With border crossings at a record high, how are policymakers responding?

Here’s how different health-care systems, including single-payer and government-run, have contended with the coronavirus.

Every four years, U.S. presidential candidates compete in a series of state contests to gain their party’s nomination. The political process is one of the most complex and expensive in the world.