Northern California, Contra Costa County, I don't know what district it goes by. Ellen Tauscher (waste of skin be she...) ran unopposed by a republican in the last race.
The "Libertarian" candidate actually took ~28%. They could have mopped with a good campaign and a real Libertarian...
Same thing happend in Taxachussetts. Kerry ran against Michael Cloud, the LP candidate. The Reps didn't field a challenger.
Bascially, in both cases, the non-liberal voters turned to the LP candidate instead of the Dem. Maybe that 28% vote in California was the best anyone could've done. They are pretty liberal out there...