Blue Gal - you too? I wrote a short article at Bad Fiction making exactly that point - that Clinton and Coakley ran very simular campaigns.
Coakley made the exact same mistake Hillary Clinton did. She went into the race thinking it was a done deal, that she was the inevitable winner, and went on cruse control the entire race. Her entire campaign was tainted by this thought, that they didn’t have to work for the win. Even down to allowing her opponent to define her rather than challenging that definition.
And like Hillary Clinton, by the time Coakley realized she had a fight on her hands, it was too late. Even at the end, when the polls saw her tanking, it seems like Coakley figured “the internal polls say otherwise” and put up a token fight at best