Don't forget a member of the Senate Democratic Caucus, Bernie Sanders, is a self-professed socialist. Obama appointed Van Jones Green Jobs Czar. He's a self professed communist. Obama in college sought out the marxist teachers.
So is Obama a socialist a la Lenin/Stalin?
Is Obama a democratic socialist a la the Europeans? The argument can be made, yes. If Obama were to show his true colors, without laws, without US politics, he'd be a European socialist. I have zero doubt in my mind. In practice though he's restricted.
The new socialism is statism. Centralized planning, control, regulations. You regulate something to the point you are a de facto controller, but in name you are not in fact the owner.