"The top priority will be to announce to the world that the United States they've known for decades is back." Former top Obama diplomat and current CEO of the think tank New America Anne-Marie slaughter predicts an American revival on the global stage if Joe Biden wins the presidency. But at a time when the United States has never been more divided, can any nation, even the world's most powerful, be a global leader if it cannot even keep its own house in order? Ian Bremmer's conversation with Slaughter is part of a new episode of GZERO World.

Watch the episode: How a "President Biden" could reshape US foreign policy