Not sure what the point of the OP is.
Obama is not a socialist, if only he was! Then he would have the confidence to get so many progressive things accomplished, and wouldn't moderate himself to seem mainstream. How silly that the right sees him as "too radical" when he is not radical at all.
The Soviet Union under Stalin and post-Stalin, was not socialist....because socialism is a society where the workers democratically control the means of production, in the USSR it was a bureaucracy of a totalitarian dictatorship controlling the means of production. This is called "state capitalism".
But on the subject of America themed music, Woody Guthrie wrote "This Land is Your Land" and he was a socialist.
Other notable socialists: Albert Einstein, Martin Luther King, Helen Keller. Well respected people, but few people know their politics were so radical. And their socialist leanings were borne out of their love for their fellow human beings and their desire for a free and equal society.
And proof that many Americans simply do not buy into McCarthyist BS: