When they talk about nationalizing the banks, do they mean all banks, or just those that are in trouble?

They being the press. However there are some economists who believe this has to happen. They say that if the IMF were to intervene in the US, they would demand nationalization of the banks. I have no idea how extensive this nationalization that they are recommending would be.

Of course, the press also is into a kind of preemptive fear mongering, since they seem to bring up the S word (socialism), and they say the Republicans will surely throw that word around like baseballs during pregame warm up.

I am wondering what this all means. How extensive is the nationalization? Will the government replace key employees at the bank? How do they expect bank behavior to change if they do nationalize?