Facebook founder and billionaire CEO Mark Zuckerberg spent the weekend in Maine, supposedly celebrating his fifth wedding anniversary. It's great that Mark and his family chose Maine for a quick vacation, and it looks like he spent at least a little time talking with the locals too.

Many have speculated that Zuckerberg could mount a challenge to president Donald Trump in 2020, and his event on Saturday in Millinocket definitely looked like a campaign stop. Speaking to an invited group of local residents, former mill workers, librarians and teachers, he focused a discussion on the local Maine economy and technology. Here's what he posted on his Facebook page after the event: