CBS's Bob Schieffer says the White House is preparing for an Arlen Specter loss in Pennsylvania tomorrow.

"I have been told on background and so forth that the White House is preparing for a Specter loss here, and the White House doesn't want to be associated with that," Schieffer told a local CBS affiliate. (Video on the top right).

Gov. Ed Rendell (D-Pa.), a Specter supporter, acknowledged this morning that the race has tightened and Specter will need a big turnout to prevail.

A Specter loss would be a big blow to the Democratic establishment, who so far enjoyed pointing out Republican infighting.