It sounds like a war, doesn't it? It's the corporate type that will most likely end up in court somewhere. Citigroup (C) offered to pay $2.1 billion for Wachovia's (WB) banking operations just 4 days ago. What I don't understand is how Wells Fargo (WFC) could go behind Citigroup's back and do a deal, just like that. A copy of the exclusive agreement between WB and C can be found here.