Race and the race

There's been much ado about the role that race played in SC. Just wanted to share an excellent analysis of entrance/exit polls by Jay Cost over at RCP. He points out that Obama appears to be losing among certain portions of the white vote, but not others. Witness his strong performances in Iowa and New Hampshire, which are whiter than Wonder Bread.

His theory:

It should be clear from this that it is insufficient to say that Clinton won "the white vote" in Nevada. It is better to say that she won a certain type (or types) of white voter. But what type? Why did white voters in Vegas break for Clinton so heavily while voters outside Vegas did not? Obviously, the ideal explanation is one that accounts for not just Nevada, but also Iowa and New Hampshire. I see three hypotheses that could connect these dots:

(a) It is a matter of GOTV organization. Obama beat her in Iowa. Clinton beat him in New Hampshire and Las Vegas.

(b) It is a matter of income. Whites who make more money tend to support Obama. Whites who make less money tend to support Clinton.

(c) White voters in racially uniform areas are more attracted to Obama that white voters in racially diverse areas.

Anyone, it's a good read for those that are into analysis.