Keith's note: (sigh) I only asked NASA and others a bunch of times about this. Clearly there are communication issues within NASA and between NASA and OSTP on things such as Astronomy Night. Funny thing: I was only interested in talking to actual students at the event - not the government wonks who are afraid to talk to me - and never say anything anyway.
If you go to the White House press briefing/media advisory page nothing is mentioned - just a fact sheet issued hours before the event. There is no place on the website to sign up to get press releases or media advisories by email or to apply to cover events. NASA PAO has a list of media who cover NASA in the DC area. They use that list all the time. They also make phone calls to media to alert them to upcoming events. The White House grounds were crammed with NASA personnel for this event. But not a peep from NASA PAO. If NASA PAO political appointee Lauren Worley had the White House media advisory why did it not occur to her that the people who cover NASA might be interested?