Will Murdoch be Zell's exit strategy?

Rupert Murdoch may be standing pat on his bid for Newsday, because he knows that Sam Zell knows that News Corp. is probably the only plausible acquirer if the highly leveraged Tribune Co. deal goes south.Like a pair of masters plotting several moves ahead in a chess game, Rupe and Sam may be using the Newsday transaction to see how News Corp. could come to the rescue in the event the Tribune Co.