This news came from Nathan Varni at ABC on Twitter. In some areas, GH aired, but it was the Thanksgiving show instead of a new episode.
#gh update due to final Prez press conf, we're going to move today's episode to tomorrow 4 all so our fans won't miss out! Thank you!— Nathan Varni (@nathanvarni) January 18, 2017
While it is frustrating to have another preemption, I'd rather have that then have some people have no or a partial episodes.