The Republicans will have control of all three branches of government for the next few years and there is a whole lot that they can do with that. As a foreigner, what worries me most is that American progress on climate change policy will be set back by another 15 to 20 years as Obama's progress will be erased and there is no progress to hope for until another Democrat is elected in four or eight years. Russia can also be expected to threaten Europe with more confidence; hopefully our defense spending will increase to pick up the slack.
The Democrats certainly brought this upon themselves. People say the primaries against Sanders were rigged, but really the problem wasn't that the DNC pushed Clinton. The problem was Clinton herself. Clinton soundly rejected Sanders' populist ideals when almost half of the party and a great number of independents supported them. All it took at that point were a few leaks and a letter from Comey to rip the blue collar worker's vote from her.