I don't think this is true. Their response to the Sharpton candidacy was to encourage Moseley-Braun to run. They didn't want Sharpton to be the "African-American" candidate.
What is Sharpton's motive? Several: 1) he says that the Democrats take African-Americans for granted and he wants to change that, 2) he wants to replace Jesse Jackson as the top "leader" of African-Americans in America. Remember when he was jailed for blocking traffic in Atlantic City? He was making jailhouse speechs against Jackson, who was still reeling from his "love child" scandal. Sharpton was making his move on Jackson.
-PJ
It is true that he snared tons of votes in the dem senate primary four years ago but Brooklyn ain't Atlanta.
IMO the winning dwarf would rather see him out and on his own. A RevAl third party run would pull votes only in areas where the dems traditionally win by huge numbers. No border-states would tip to the GOP because of him siphoning off votes.
Put Al and W with the winning dwarf in a debate and the dwarf automatically triangulates and wins the middle.