Classical Liberals and especially Neoliberals (what the Democratic party is) are solidly against nationalized industries and while liberalism is ok with either laissez-faire or regulated markets, neoliberalism is strictly anti-regulation.
Socially democratic nations (Nordic nations being the most consistently socially Democratic) have nationalized industries (Norway has its energy, transportation, finance, and communications all nationalized).
Probably the closest the US has ever been to social democracy was when social security and the new deal were enacted. The Democratic party has never been majority Socially Liberal to my knowledge, which is one step right from Socially Democratic, which is yet another step right from Democratically Socialist.
Once you punch all the holes you get a free attack of your character!