Ken Barnes, a long-time Republican from Sacramento, announced today that he’s fed up with the GOP.

Why?

Because he’s an African American, and he’s finally getting the hint: Viewpoints: Racist cartoon of Obama forces me to leave GOP.

I was one of those rare species: a black Republican, the guy willing to spit into the wind of conventional thought, who was often showcased on camera at party events to prove inclusiveness.

But as a proud black man, I can no longer be a member of the Republican Party. …

I have had the pleasure of serving as president of the Sacramento Republican Assembly, a term as a member of the California Republican Party executive committee, and most recently as treasurer of the Sacramento County Republican Party.

Last year alone, I donated more than 400 hours of my time to the Republican Party and made financial contributions to a number of Republican candidates.

As of late, however, when I look at myself in the mirror there is one question which perplexes me: Can I, in good conscience, remain affiliated with an organization whose message purveyors of racism and bigotry find attractive? …

The latest incident in a string of tawdry, race-based actions was the promotion of a racist cartoon by elected Orange County Republican Party Central Committee member Marilyn Davenport. The cartoon depicted President Barack Obama and his parents as chimpanzees, while simultaneously implying that the president is not a legitimate American, but rather an African-born interloper.

While the Orange County GOP chairman and a number of other committee members were quick to condemn the image and Davenport, what’s disturbing is the incredible number of people who continue to defend Davenport’s actions as well as the cartoon itself.

Had this been an isolated event, it could be set aside as a mere aberration. However, when placed in the context of similar offenses by the same self-identified tea party-conservative Republicans, there emerges a disturbing pattern of extreme intolerance.

Over the past two years, we have seen Republicans use long-held racist imagery in portrayals of Obama. The president has been depicted as a communist witch doctor, a man inclined to plant watermelons on the White House lawn, and we watched in disbelief as his face was placed on an “Obama Buck Food Stamp” along with stereotyped pictures of fried chicken, barbecue ribs, Kool-Aid and the obligatory watermelon.

What does any of this have to do with public policy or conservative values? Here is a man who excelled academically at the finest schools in the world, has a wonderful in-tact family, worked hard and rose to become president of the United States. Yet in spite of his accomplishments, the president is still labeled an illegitimate, socialist, African witch doctor and has his face superimposed on a chimpanzee.

If this can be done to a black man who is the leader of the free world, how long will it be before fellow Republicans insert my face on a chimpanzee?

The image that was the final wake-up call: