The story

At first glance, the expectations game in Tuesday's Democratic primaries could appear counterintuitive.

Kentucky has a much higher percentage of African-American residents (7.3 percent) than Oregon (2 percent), yet Sen. Hillary Clinton is favored to win big in Kentucky, and Sen. Barack Obama is the heavy favorite in Oregon.

Why?

Affluence is another dividing line in this year's Democratic nomination battle -- and could well be the leading indicator in this week's showdowns.

Clinton's foundation in recent primaries has been blue-collar and rural white voters, and Kentucky offers them in large numbers, like its neighbors Ohio, West Virginia, Virginia and Tennessee. Read full article »

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