According to Wikipedia: The Hammer and Sickle is a part of communist symbolism and its usage indicates an association with Communism, Communist Party, or Communist State.

I saw this sticker yesterday. I suppose the statement is that President Obama is a communist. 

I find joy in contrast. I love when ideas run head-on into each other. The ideas of freedom of speech, freedom of expression, freedom of the press all heading full steam into the ideas of Communism, the Communist Party, and a Communist State. It always makes me smile!