Obama is somewhat of an anomaly in the world of campaign slogans simply because he has used so many. Finding a complete list of his slogans is almost impossible as many people think they've found them all, but then the comments of the article will say, "But what about this one?". 

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As a President well known for his eloquent speeches, it's surprising to learn that he hasn't settled on one solid campaign slogan. Perhaps this is a testament to his ability to take a simple phrase and deliver it in such a way that it becomes something more. 

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All this being said, I will not even attempt to claim this is a complete list, rather a biggest hits compilation.