http://people-press.org/report/610/socialism-capitalism
Democrats are more positive than negative towards the word "socialism". Also, young people, the uneducated, blacks, and the poor like "socialism".
Also, 38% like "libertarian", and 37% don't like the word. Independents like it the most. Republicans like it the least.
But... everybody likes "progressive"!
In France, the "Democratic party", the left-wing biggest party is called the "Parti socialiste"... so here, 100% of the PS members like the word "socialist" :)