I wonder how likely it is that both parties stay where they are in 2010 (in other words, any gains made by the one party will be canceled out by the gains of the other party).
Seems like a reasonable possibility.
Indeed--I wondered about that possibility because on the one side we have people who think that the Democrats will make gains, and on the other side we have people who predict that the Republicans will make gains. With that in mind, surely there is a chance that each party will cancel out the gains made by the other party, and thus the senate stays in favor of the Democrats 60-40, special elections/appointments aside.