It looks like the Obama Administration didn't learn anything from that "teachable moment" of the Sherrod affair.
Now, I've never liked Charlie Rangel. He always struck me as the kind of politician who keeps a tip jar on his desk and has a night deposit slot for bribes in his office door. Still, it is rather unseemly for the President to be so quick to throw him under the bus. If, on the other hand, Obama was trying to stick it to Sen. Ben Nelson for throwing Elana Kagan and the unemployed under the bus then he missed the target by a wide mark.
Obama has an odd sense of loyalty - he is not loyal to his friends and rewards people who are not loyal to him. I just can't figure out the political utility of that.