Warning: Satire ahead.
"Dear Readers: Dozens of ustedes have sent the above question since the Iowa caucuses, forwarded mainstream media reports on this supposed phenomenon and cringed with me when pundits took as gospel Hillary Clinton pollster Sergio Bendixen's assertion to the New Yorker that "The Hispanic voters — and I want to say this very carefully—have not shown a lot of willingness or affinity to support black candidates." So, to all parties who buy into the hype: callensen el osico. Shut up. Stop with the racial pendejadas, and go tell your pols that sharing tacos with Mexicans for the news cameras is one step removed from blackface.
The negrito-hating Mexican voter meme floating around America these days is the biggest ball of political mierda since Tom Tancredo.."
http://www.eugeneweekly.com/2008/02/28/askamexican.html