I think that, if the climate is good enough, the Democrats can actually gain seats.
Hahahahahahahaha!!
Not that 100% agree with Snowstalker, but it is somewhat possible. They'd have to hold all their seats, except Nebraska and North Dakota, in addition to knocking off Heller, Brown and then possibly Hatch with Matheson or Indiana if Lugar loses the primary. That would be a net gain of 1.
And the possibility of that is so close to zero you couldn't even see it on a microscope
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I was thinking the same thing about the Republicans in Oct 2009.
It's certainly not looking likely at this point, sure, but your statement is a huge exaggeration.