Connecting to the audience

That was quite a speech by Michelle Obama at the Democratic Convention. Political objectives translated into human story telling. Call it the inverse strategy, rather than attacking your opponent directly and saying that he measures achievement only in terms of dollars, and will never be able to understand the hardship many Americans go through because he has never experienced it himself, portray your own situation as the exact opposite. Make all the accusations implicitly

Short sentences (fits in 140 characters), natural language, no buzzwords, lots and lots of real-life stories. You see the people in the audience completely glued to the stage, hearing what they wanted to hear.