In his latest Quick Take, Ian Bremmer argues that the war between the United States and Iran has entered a more dangerous phase, with both sides demonstrating they can sustain military and economic pressure without forcing the other to back down.

In his latest Quick Take, Ian Bremmer argues that the war between the United States and Iran has entered a more dangerous phase, with both sides demonstrating they can sustain military and economic pressure without forcing the other to back down.