A leading Republican candidate for president, Sen. John McCain, tells CFR.org the country needs to unite over issues ranging from Iraq to immigration.

A CFR expert on nuclear issues, Paul Lettow says President Obama’s agenda will be heavily tilted toward nuclear issues in 2010. He says this is "the ideal moment for strong American leadership on the…

Paul Kerr, a nonproliferation expert for the Arms Control Association, says any international deal worked out with Iran should include a pledge by the United States not to seek regime change in Iran …

The Obama administration has other methods to pursue a binding international agreement on climate change in Paris that fall short of a treaty, says CFR’s John B. Bellinger III.

Philippine President Rodrigo Duterte’s war on drugs has led to thousands of extrajudicial killings, raising human rights concerns, says expert John Gershman in this interview.