Because:
1) We don’t want the bad guys to know what our stuff can do.
2) We don’t want the bad guys to know that we know what their stuff can do or what they’re planning to do with it.
3) We don’t want the bad guys to know how we found out what their stuff can do and what they’re planning to do with it..
4) We don’t want the bad guys to know what we’re planning to do about their stuff and their plans.
The “bad guys” are in the Whitehouse.