Enter Hillary Clinton: a seasoned politician with a slick PR team and the majority of the world's media behind her.
Now enter Donald Trump: a brash reality TV star with a penchant for aggressive outbursts on Twitter.
Even if these aren't the most obvious ingredients for a presidential race, surely the outcome is a given?
Yet in one of the most incredible upsets in modern political history, Donald Trump defied the odds and emerged triumphant, leaving his opponent - and the rest of the world - reeling from her shock defeat. But where did it all go so wrong for Clinton?