I answered Yes, and I'd say "Yes, and that's a good thing". Of course, you'd have to define "socialism" a lot more precisely. In the meantime, you can go with whatever label you want.
The mere fact that you ask the question make it sound like it may be frowned upon. It may be in Texas, and in the US generally. It doesn't raise an eyebrow over here. In my country, millions of people proudly define themselves as socialists. We had several Socialist governments since I was born, and the Earth didn't stop turning. We didn't turn into a Soviet regime despite the CIA's fears.
I haven't seen the Michael Moore movies, though I read one of his books. I'm strongly tempted to side with him on many issues, but I try not to forget that he uses "shock therapy".