Manchin has 59/32 approvals. Are WVans that hackish that they'd vote for Raese?
Sometimes a guy just gets drowned by a wave.
Lincoln Chaffee lost his senate seat in an anti-bush wave when he had (according to the exits polls) a 61% job approval rating.
I also have a suspicion that some of the PPP polls are getting juiced as a dailykos tool to try to wind up the Dem base and help narrow the enthusiasm gap.
PPP saying the Dem would be +6 if it were 2008 is consistent with Rasmussen's +7 (Rassy tends to model the last election pretty heavy in to the next election which explains the similarity)
All that being said...
One poll, is, well, one poll.
Lets see a few more before we make any assumptions.
As an aside..
This traditional vote division is exacerbated by a 10-point pro-Republican enthusiasm gap. John McCain won the state by 13 points in 2008, but West Virginians who plan to vote this year report casting ballots for McCain by 23 points over President Obama—This is a truly bad question to use in a poll.... this type of question just simply does not work, when an incumbent is hugely popular, far more people "voted" for him/her than actually voted for them when you do a poll, and the opposite is also true.
In 1972 Richard Nixon got 60% of the vote, yet in 1974 post Watergate polling, apparently he "lost" the election something like 48-52 when they asked people who they voted for.... I suspect we have much of the same thing happening here.