I was happy when BR endorsed Obama and of course, TH went into defense mode and reduced BR down to a racial endorcement claiming that his time to endorse was before Texas and now it's meaningless.
Here's a hypothetical dialogue I came across at Kos.
Bill Richardson: Hey, Hill? After much thought and deliberation, I've decided to endorse you.
Hillary Clinton: Too late.
HC: Yeah, the time when your endorsement could have been effective has long since passed.
BR: But, I'm a super delegate, and ultimately, we'll be forced to decide this thing!
HC: Not important. Frankly, Bill, I just don't think yours would be a significant endorsement in this environment.
BR: So you're telling me that my endorsement means nothing?
HC: That's exactly what I'm telling you. It doesn't matter. A few weeks ago? Maybe, but today? I don't want it. It's useless.
BR: Frankly, Hillary, I'm finding this a bit disconcerting.
HC: So? What are you going to do about it?
BR: Endorse Obama.
How do you think Carville could spin that?