The benefits of their personal relationship are clear for the Turkish president. But the U.S. president has his reasons, too.

To curb violence and drug trafficking, Mexico needs functioning civilian police forces and court systems, not US military strikes and boots on the ground.

Mikhail Gorbachev will be remembered in the West for laying the basis for more constructive relations to ease the end of the Cold War, but vilified in Russia for speeding the Soviet Union’s demise.