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

Why are some countries issuing travel advisories for visiting the United States?

You'd call it an abundance of caution, but things are moving very quickly in the US. It's only been two months since Trump has been inaugurated. And many countries, allies of the US, feel that treatment of their citizens will not be aligned with rule of law in the United States. Certainly, worry given, for example, some green card holders facing deportation for what would be considered for an American citizen just exercise of freedom of speech, freedom of organization.