What started out as Marxism has evolved over the years. When Marxism became a bad word, communism was the term of the day. When communism became a bad word, it was changed to socialism. When socialism became a bad word it was changed to liberalism. Now that liberalism has become a term of shame, the term of the day is populism (I'll define populism in a few days).
As you can see by the poll, 61% of democrats believe in socialism (liberalism) and 17% of republicans. The believers of liberalism in the democratic party are aplenty in Washington at the present time, as you have Obama, Reid and Pelosi and their followers.
In the republican party socialism (liberalism) is less prevalent, however you have your moderate republicans like McCain and Snow and republicans who cater try to draw in independents by giving them what they want in the form of government programs. And, likewise, to pay for these programs you have to take from the rich and give to the poor, which is socialism.
Even George Bush had his liberal tendencies, as with his education programs, his prescription drug program and his quest for amnesty for illegal aliens. These are all quasi forms of socialism.
Yet, no party is stuck with more socialists than the democratic party. I'm telling you, as I talk with some of the liberals I work with, they say things that prove to me that their core beliefs lie in socialism.