A collapse of this Cold War–era INF treaty, which many believe has favored the United States, could unleash a new age of nuclear weapons competition with Russia.

UK Prime Minister Theresa May has been unable to convince her own party to pass the Brexit deal she negotiated with the European Union because of its backstop provision. What is it, and why does it m…

Ukraine’s presidential campaign—the first since the upheavals of 2014—is drawing to a close, and the most improbable of candidates has taken the lead. Could he really become the country’s next presid…

Chinese President Xi Jinping’s signature project, the Belt and Road Initiative, got a boost when Italy became the first major European country to join. What was behind Italy’s decision and what might it mean for allies in the United States and the EU?

Israeli Prime Minister Benjamin Netanyahu campaigned on his tough diplomacy and his relationship with U.S. President Donald J. Trump. What happens now for the Palestinian peace process?