President Barack Obama’s week of summitry indicates that, increasingly, the most vexing global problems are unlikely to be solved by treaties, says CFR President Richard N. Haass. An informal approac…

CFR’s Michael Levi says the Obama administration faces tough negotiations on a global climate change agreement at the December Copenhagen meeting without clear support from Congress. But he says Obam…

The Republican gains in Congress mean complications for President Obama’s arms control policy, a stalled climate change agenda, possible movement on trade, and likely more support on Afghanistan, say…

An interim nuclear accord between Iran and world powers is still within reach despite lingering disagreements over details, says expert Barbara Slavin.

Yvo de Boer, who heads the UN Framework Convention on Climate Change, says global economic woes are a setback for climate change policy but new U.S. leadership is a "huge signal of encouragement to t…