The Islamic State’s attack on Paris demonstrate that both Europe and the United States need to commit to winning the ideological war against extremism with renewed vigor, says CFR’s Farah Pandith.

Sustained diplomacy led to the Iran nuclear deal, but it’s too soon to expect broader discussions between Tehran and Washington, says expert James Dobbins.

Beyond China’s market upheaval is a country struggling with how to relax state control over the economy amid a slowdown that has global implications, writes CFR’s Robert Kahn.

The Republican presidential candidates are aligned on most foreign policy issues, but they could quarrel over immigration and the Iran nuclear deal in their first debate, says CFR’s James M. Lindsay…

Special tax incentives have enabled Puerto Rico to borrow irresponsibly for years, and now the island must take painful steps to balance its budget, explains expert Matt Fabian.