re: The NSA deleted millions of phone calls and text messages to hide spygate.

Seems like he's bringing this to everyone's attention and since the media won't report on it, there's got to be very damning evidence against someone(s). You can bet that if there was something Muh Russians in there this would have been all over the propaganda media months ago.

If he's tweeting about this he already knows the answer.

Trump wants everyone questioning, "Why is there so much data collected"? and also "what's in there that they wanted to delete"? Start to ask those questions and demand more digging. This is how information will come out.