Indeed, and your link to the 14th Amendment is dead-on. The issue she's actually addressing is the corporate shield of non-responsibility, which has zero support in the original (pre-14th) Constitution.
It's breathtaking that she should even acknowledge the existence of this elephant of all elephants that is not only in the living room, but that has crushed the entire house beneath it. Unfortunately, liberals are utterly dependent upon their corporate shields - without it they would be destroyed. So I don't see this going anywhere. Nevertheless, it's a way big surprise from her.
(On the other hand, she could have simply screwed up by musing out loud, trying to find a way to protect McCain-Feingold.)
Thank you, I wrote that. There's a lot more like it at the same source.