It’s got everything. Race. Sex. Money. Brittany Spears must be next.

Let’s – gingerly – explore race. Hispanics vote for Hillary (or, more to the point, against Obama) two to one. Asian-Americans vote for Hillary (and against Obama) eight to one. African-Americans vote for Obama four to one.

Blue collar Democrats in New Jersey and Massachusetts vote against Obama (and for Hillary). White collar Democrats and college professors vote for him and against her – apparently bothered that Bill compared Obama to Jesse Jackson before the South Carolina primary.

Then there’s sex. Women prefer Hillary. But white men – from Georgia to California – prefer Obama. Another fault line.

Of course, none of this means the people voting in Democratic primaries are racist or sexist.

A blue collar Democrat in Newark may just not be able to identify with an African-American candidate – as well he can with Mrs. Bill Clinton.

And a young woman clawing her way up the corporate ladder may identify with Hillary – and not Obama – because in her world it’s the men – the suits – holding her back.

But, nonetheless, all this is creating a bit of stress in the Democratic Party. And could create a lot more.