I vaguely remember recently reading a story (or possibly seeing a TV episode/movie) about a Rip Van Winkle-ish character from the 1950's or 60's waking up in (or being transported to) the 1980's, and being told that Ronald Reagan was now the US President- he refused to believe it, thinking that he was being pranked- "what?! The actor!?!?!" Can you imagine someone from the 50's/60's being told that a reality-TV star had been elected President? First you'd have to explain "reality TV," then "trolling," before you could get to the 2016 election; by then, I would guess our time traveler would be saying "yeah, you know what? Cell phones are kind of neat, GPS in your car seems really handy, and the Internet is like magic- but I think I'd like to go back home now."
(Hell, I'm sort of a time traveler from the 60's, and even without the benefit of skipping the years, I feel that way sometimes)