US Election 2016 Results: Five reasons Donald Trump won

Donald Trump has defied all expectations from the very start of his presidential campaign more than a year ago.

Very few people thought he would actually run, then he did. They thought he wouldn't climb in the polls, then he did. They said he wouldn't win any primaries, then he did. They said he wouldn't win the Republican nomination, then he did.
Finally, they said there was no way he could compete for, let alone win, a general election.
Now he's President-elect Trump.
Here are five ways he pulled off what was unexpected by most and incomprehensible to many.