WV isn't a proxy for the rest of the country.
In 2004, the Democrats were fixated on "electability" and chose Kerry over Dean. As a result, Kerry spent the campaign defending himself against "you voted for the war too," and ended up NOT getting elected.
This year, why chose a candidate that voted with McCain on the war when a stark distinction can be made selecting one that was against the war from the start? As Theo suggests, the country is rejecting Republicans even in their safest districts -- which may mean it doesn't matter who the Dems select.