Religion’s place in the Iranian political system has long been debated among scholars, but a president who blurs the line has refocused attention on the topic

Evangelical Christians have been a force in U.S. society dating back to the nineteenth century. But experts say in recent years their influence on U.S. foreign policy has grown, from humanitarian act…

The flow of Russian conventional weapons to Iran—notably sophisticated surface-to-air defense missiles—has increased markedly of late, complicating U.S.-led efforts to tamp Tehran’s nuclear ambitions.

Since cutting ties in 1979, U.S.-Iran dialogue has been sparse and largely fruitless.