Ian Bremmer shares his insights on global politics this week on World In :60.

If China, Japan, and South Korea formed a united front, what kind of leverage would they have in negotiating against US tariffs?

Oh, if that were to happen, they'd have incredible leverage because China's the second-largest economy in the world, Japan's the third. This would be a really, really big deal. Except for the fact that it's not going to happen. Their trade ministers did just meet, and they've had some interesting coordinated statements. They do a lot of trade together, and they want to continue that. But the fact that the security of South Korea and Japan is overwhelmingly oriented towards the US, and they would not want to undermine that, means that they will certainly not see China as a confederate to coordinate with against the United States, not least on trade. The American response would be belligerent. So no, that's not going to happen.