Herman Cain just may represent the greatest threat to the viability of the Democratic Party since the 1960s. The reason why is simple:
Because he is black. And he's a Republican.
Worse yet: he could be remembered as the successful second black president who immediately followed the failures of the first. With such a legacy, he just might create a new wave of open-minded voters within the black community.
Such a wave would carry truly dangerous implications for the Democratic party.
For the past 40 years, Democrats could more or less take the African-American vote for granted. Paradoxically, many of these minority voters are not fully invested in the standard liberal agenda that the Democrats have come to represent. This is particularly true amongst those within the minority demographic who are middle class and church going.
Such members of the black community tend to not be too keen on homosexuality, are critical of abortion, value the presence of God, and are concerned about a cultural war on Christ. These African-Americans desire a return to values whereby young men pull up their pants, fathers are present for their children, and that one takes responsibility for one's life. The Pew Research Center describes such voters as New Coalition or Hard-Pressed Democrats, and make up the majority of the minority wing of the Democratic Party.
The issue of race has habitually guided the vote of such centrist African-Americans, despite an alignment more in tune with social conservatism. Under the popularized notion that Democrats best represent minority interests, their minds have been generally closed to the idea of voting Republican. It is among such anti-republicans that Herman Cain describes as "brain-washed," given that much of their news diet resides in traditional media.