Democratic U.S. Sen. Patty Murray's campaign is preparing supporters for a possible tightening of her race against Republican Dino Rossi as more ballots are counted today.Murray's deputy campaign manager, Alex Glass, said she won't be shocked if Murray falls slightly behind Rossi this afternoon. That's because King County is only expected to count 45,000 ballots, which may be dwarfed by new totals from other counties. (Spokane County alone will count 30,000.)In a new memo on the state of the race, Jeff Bjornstad, Murray's campaign manager, predicted Rossi will lose even if he appears to surge today."The varying rates of counting...