It's pretty obvious that Waters is a socialist. It's just too bad she can't use the word and admit it. Nationalize the oil industry? That is what she was advocating, after all. She didn't want to use the word "socialism" and couldn't think of the synonym "nationalize" right off hand.
She is what she is. She does not represent mainstream Democrats, however, no matter how much the Republican partisans would like to convince is she does.