[Nas808]

Could these big tech firms challenge this in court? It seems like a very ambiguous use of "national security reasons".

[coffeefirst]

Yes they can. And they may, but we don't know for sure whether they disagree or care to react at all.

Given the administration tends to make decisions based more on xenophobia than empirical evidence and there's good reasons to think these apps have shady data practices, nothing about this situation is clear cut.

[ngcc_hk]

Google, FB should try in china.

  Fighting for the freedom of chinese app to be installed in USA land but theirs can’t.  It does not fit the freedom for all concept I guess.