I'm sure Card is a decent guy, and he has received credit for having almost no ego, but I have criticized him regularly in FR threads. In his public appearances, I've never seen him do anything but artlessly mouth the talking points of the day. No creativity, no insight.
That's fine if your only role is to act as a gatekeeper. But if suddenly you have to step up, in Rove's absence, and provide front-line advice, it can lead to mistakes.
The President should never have taken back his yellow cake claims made during the SOTU. They were true.
That is the genesis of all this craziness.