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

How big of a deal is Russia pulling out of New START?

Well, this is of course is the nuclear agreement that the Americans and others have already been accusing the Russians not of being in compliance with. The nature, of course, of the US-Russia relationship right now is completely broken. There's no high level engagement or diplomacy. It is notable that Putin said in his annual State of the Union speech, the one that he essentially canceled last year, that he is suspending Russian participation in START, but not withdrawing. I don't think it's a nothingburger. I think it matters because generally nuclear temperatures have been going up over the past months, but this is not a particularly large issue.

Is China's potential support of Russia in Ukraine a "red line" for the West?

Yes, this is a much bigger issue. We are talking about a peace deal that the Chinese are saying that they're going to announce in short order. President Xi planning a big speech on February 24th, which is the one-year anniversary of the Russian invasion. That's unprecedented for China to suddenly be taking a leadership role, a public leadership role, on an issue that is not of primary national security concern to the Chinese self.