Quid pro quo... or tit for tat

Slate's John Dickerson brings up an interesting question: How did Barack Obama win the support of former candidate Bill Richardson?

Dickerson suggests the two pols might have worked out a deal, where Obama gets the endorsement, while Richardson gets picked as the vice presidential nominee or wins a cabinet role if Obama is elected.

It's not hard to imagine Richardson as Obama's running mate.

The current governor of New Mexico's long resume would add experience to the Democratic ticket, and his Mexican heritage would help bring the Latino vote into the fold.

But, I think there may be other factors at play.

Maybe the governor felt miffed by Hillary Clinton's suggestion that Obama would make a fine vice presidential candidate, on her ticket.

After all, this winter, Clinton was making similar (and maybe more realistic back then) invitations to Richardson.

Of course, most people saw Clinton's suggestion that Obama take the VP slot as a ploy, rather than a genuine invitation.

But maybe Richardson felt passed over by the former front-runner, and wanted to let her know she can't have it both ways.

Or maybe after Clinton used the hypothetical VP pick to undermine Obama, the New Mexico governor looked back at her hints this December with a new set of glasses.

When compliments become condescending, the formerly flattered might feel miffed.

And this wonderfully written piece in the New York Times shows just how pissed the Clintons were about the endorsement - and that Richardson knew perfectly well how the former first lady would see it.