Can one of the United States' closest allies count on it when the chips are down?

That question was up in the air during the four years of President Trump's administration. And now that the former President has a real chance of winning the White House in 2024 again, it's an urgent question again. And it's one that Ian Bremmer puts to the US Ambassador to Japan, Rahm Emanuel, in the last episode of GZERO World.

In an exclusive interview in Tokyo, Bremmer and Emanuel discuss various topics, ranging from the crucial (but complicated) US-Japan relationship, the ever-present security threats China poses, and the raging conflicts in the Middle East and Ukraine.