They certainly can restrict technology that is deemed to be a national security risk.
replyNot much stops them from saying it's due to national security, when it's actually due to the guy in the chair having a fit of emotions. And the current admin has a very long streak of declaring things as national emergencies when those things just so happen to be something they recently lost face on.
replyIt is kinda amazing how quickly everybody else is to support authoritarianism if it agrees with some perceived slight of theirs.
replyI guess that is how it always starts.