We're about to go on a 4 day week-end with lots of fireworks, hot dogs and American patriotism. A 3 day week-end is always a good time to drop a political bomb and a 4 day national holiday is even better.
So, if I were a cynic, I would expect some combination of firing Robert Muller, releasing an update Senate health care bill and / or announcing a Russian action (either giving them back their compounds or a full on meeting planned for the G20) in the next 36 hours.