I also cross posted this at MyDD.

A lot has been made about how Obama can't win without white working class voters, women, and latinos.  Many have argued that these groups just won't vote for him.  I have pointed out without doing the serious number crunching before that this is just not true and that the key to a democratic victory is SOLID African-American support. I have now done the number crunching based on the 2000 and 2004 exit polls for key states such as Pennsylvania and Ohio with the help of others and without a doubt, no matter the maximum increase of voters in Hillary's  "voting blocks, " she nor any Democrat can win the White House without SOLID African-American support.

Here's why: