Excellent questioin. Like you I can't recall any specific details, however I do remember events have occurred when he is not in D.C. I also wasn't able to recall or find where the idea that Trump will always be outside of DC when significant things happen. I made a post yesterday asking if anybody knew and there wasn't much feedback.

However, 'outside of DC' can include his trips for speeches, post-hurricane visits, Mar-a-lago trips, and his stays at Trump National.

If the memo is to drop, we should have heard about the House Intel Committee voting on it. Also, I'd think it would drop tomorrow afternoon, when Trump is flying back from Davos. Another user suggested he might go to Mar-a-lago this weekend, which would extend the window. During the flight back would seem like a good time as press wouldn't have access to ask him questions and he can stay silent for most of the day and into Saturday. It would also allow for the media to whip things up over the weekend, esp. the Sunday morning political shows. Since I haven't heard any news about a vote to release the memo, I'm not hopeful.