He and his wife were at Fiola, an upscale Italian restaurant on Pennsylvania Avenue.
If he made a reservation ( as you need to do for this restaurant), then someone at that restaurant might have notified the protesters.
I am going to call them and ask for an explanation. We are not going back there next time we are in DC.
"...reservations..."
Post that down in the twitter sewer. Let them run with it. Most likely the same M.O. they used to go after Sarah Huckabee Sanders.