Brazil has long sought a greater role on the world stage, but political upheaval and other enduring challenges have complicated its efforts.

Russian leaders have watched with mounting resentment as the transatlantic alliance has nearly doubled its membership since the end of the Cold War. President Vladimir Putin has drawn a red line in U…

Charges of foreign power interference in the U.S. presidential election have raised grave national security concerns and touched off multiple federal inquiries that could drag on for months.

The United States is witnessing another year of record gun violence, raising domestic and international scrutiny of its comparatively loose gun laws and placing pressure on lawmakers to enact meaning…