As whites are dying off, they are not replacing themselves. The black population, now about 32 million, will double in the next 60 years. And the Hispanic population will triple.I know it is considered impolite to worry about this trend. We are all the same under the skin, the argument goes. Whatever the truth of that assertion, it is an emprical fact that, in a mixed-economy democracy, nearly every racial and ethnic group votes its group interest except the white population. Whites don't vote for candidates that promise to promote white interests, whereas blacks and Hispanics do.