I'm not of the sort of socialist that organises into petty marches and calls for world union. I think sometimes that Americans get a very skewed view of socialism. Everyone in Europe is socialist to a degree -- I vote for the Labour Party here in Britain, which is part of the Socialist International, and is the second-largest party, not to mention the most likely candidate for the next election.
When I say socialist, I merely mean that I'm a supporter of the Labour Party in Britain (as well as the Socialist Party in France, and other European Parliament allies). The Debate Politics political-lean choices aren't well suited to the European political spectrum.
Anyway, I would probably classify the Democratic Party in the United States as very weakly socialist, though they would never say so themselves.