Without diplomatic progress over the next several weeks, world powers and Iran may squander their best opportunity for a comprehensive nuclear agreement, says expert Daryl G. Kimball.

Fifty years after JFK’s inaugural, presidential historian Robert Dallek observes that Kennedy remains the most popular American president even though his days in office didn’t yield many domestic suc…

President Obama’s cancelled state visit to Moscow next month is another indication that the so-called U.S.-Russia reset has derailed, says CFR’s Stephen Sestanovich.

F. Gregory Gause, a leading Saudi Arabia expert, says the U.S. plan to sell some $20 billion in sophisticated military hardware to Saudi Arabia and other Gulf states is part of a concerted effort in …

Russia’s military buildup in Syria could set back the self-proclaimed Islamic State and lay the groundwork for a political transition, but could also lead to a confrontation with the United States, s…