Romney and Huckabee compared to McCain

[nclib]

Not certain about the specific counties, but I certainly agree with below:

To answer the question, McCain was - by far - the most electable Republican last year.  Had Huckabee or Romney led the way, the effect further down the ballot would have been even worse.

Keep in mind that GOP House and Senate candidates on average did worse than McCain. The only GOP Senate candidate who ran over 10 points higher than McCain was Susan Collins.