According to my sources, the Davis campaign turned down several opportunities for personal appearances in key microtargeted communities. He failed to excite because he failed to show. The Democratic voters of 2006 and 2008 stayed home because he was anything but an Obama candidate.
When it came to understanding the structural problems of Alabama, Davis was the only candidate to “get it” and say so; but he forgot to tell enough of us. OTOH, his errors have decisively disproven the idea that black voters won’t choose a white candidate.