The United States is the world's undisputed superpower. But how much longer can that last? Enter: China. On the show Ian Bremmer breaks down the three key points that constitute a superpower and then talks to the man who once commanded the world's most powerful military, former Defense Secretary Ash Carter. And on Puppet Regime, President Trump channels his inner Patton.

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In Iran, a shooting war has given way to a fragile ceasefire and a high-stakes standoff in the Strait of Hormuz, with the global economy hanging in the balance. Iran now holds effective control over a critical oil chokepoint, says Eurasia Group energy analyst Gregory Brew, while the US enforces its own blockade to try to squeeze Iran.