No, it doesn't mean that there are no socialists in the US. But if the people of the US, as a whole, have by whatever means come to hate and fear socialists and

No, it doesn't mean that there are no socialists in the US. But if the people of the US, as a whole, have by whatever means come to hate and fear socialists and socialism, then someone who's willing to describe himself as a socialist is not likely to do well in a US general election.