Who is reponsible for McCain's imminent election loss ?

[Iosif]

I think blaming it entirely on the economy is dishonest, as Obama led throughout the summer and McCain only had a small, low single digit lead for two weeks directly after his convention. The polls did turn after the crash but there's nothing to suggest that McCain's lead would've remained otherwise.

The real answer is the Republican failure of the past 8 years. Pretty much any competent democrat would've beaten McCain.