Yeah, I can provide an alternative solution: ban its use within the government for sensitive uses, but allow its use by citizens. Issue a public notice to citizens that any wechat communications may be known by the chinese government.
If there's an actual national security issue with private citizens using the app, they should air it and give it a chance to be addressed, or succeed in court on its merits.
> I don't think that USG could achieve the goals of Chinese not being able to intercept US communication
Frankly, that shouldn't be a goal of the us government for private citizens. The us government can protect government communications all it wants, but private citizens should be free to use chinese services if they want. I know someone learning chinese in an american college, and one of their resources is using weibo (a chinese twitter clone basically, definitely hosted on chinese servers). If US private citizens using wechat is "china intercepting us communication", than this person using weibo and emailing chinese students to learn would count too, right?
It seems like a clear violation of the 1st amendment, and the justification seems very flimsy, at best.