Guess you didn’t follow Kampuchea’s primary performance. She got killed in the black vote, because they don’t consider her black.
No, a veep NEVER makes a significant difference. Probably the closest two were LBJ (60) who saved TX for JFK; and Palin (2008) who kept massive conservative defections from McTurd from happening. Other than that, no veep can significantly lift a flopping demented perv like Biteme.
Harris, just like "Marsha" Coakley, made her career locking up the bruthas.
This cannot win the votes of blacks.