Mark Zuckerberg completely shocked an Ohio family by crashing dinner at their house to talk politics ... among other things.
Daniel Moore tells TMZ ... he got a call last week from a Facebook staffer who asked if a "wealthy philanthropist who works in California" could come over for a meal. He was told the mystery guest was traveling around the country to meet middle class families so he could figure out how to invest his money.
Moore says it was a "jaw-dropping moment" when Zuckerberg was the one to appear at his door Friday night.
We're told they discussed many topics -- including why the Moore family voted for Donald Trump -- and Zuck was respectful and agreeable on many things ... like there being a lack of high-paying manufacturing jobs.