WeChat is enormously popular in the US. Every Chinese person here uses it. That means a huge number of US students and employees.

I think the US should pass and aggressively enforce anti-snooping laws. No company allowed to monitor communication of customers over whatever platform that company is selling (unless the product requires it or that IS the service - some sort of Mood Analysis API or whatever). Would also conveniently take care of a key net neutrality point :)