While many regions such as Atlanta have a diverse population, other regions lack racial and ethnic variety and will have to deal with a new kind of population, he said.
The argument that Obama's slender re-election majority is better than Bush's rests on demographics--on the observation that the Democrats do better among racial and ethnic minorities and unmarried women, population subgroups that are increasing as a share of the electorate.
Trinidadians of African and Asian descent each make up about 40% of the population, and tend to vote along racial lines.
And while only 4, 000 self-described Macanese now remain among a population of 450, 000, the racial mixing that distinguished the Portuguese in their empire from, say, the British in theirs has bequeathed the onetime colony an air of acceptance, and of variousness.
The mixed-race population has increased, due to both inter-racial marriages and Census Bureau forms in the past two headcounts that allow people to identify themselves as more than one race.
Before long, the Employment Equity Bill, passed in August but not yet implemented, will force all but the smallest firms to submit annual reports to show that they are trying to make the racial and sexual composition of their workforce match that of the local population.
Seizing on Mr Zacarias's Hispanic origins, a group of protesters declared the clandestine ouster meeting (although its secrecy followed the pattern set under Mr Zacarias) to be an act of racial disrespect in a district in which nearly 70% of the school population is Latino.
Half a century later, more than half of Detroit's population is gone, victims of downturns in the auto industry and a racial divide that continues to this day.
New Mexico, Colorado, Nevada and Arizona, where a good part of the sizeable Latino population has been roused to action by a new law that they consider encourages racial profiling, account for a mouthwatering 31 electoral votes.
PPIC, lies in racial and ethnic differences: California's Latinos, who make up 35% of the population, and blacks (around 7%) are much more likely to be overweight than California's non-Hispanic whites (45%) or Asians (12%).
ECONOMIST: Even in the home of beach volleyball, obesity is on the rise
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