When I first saw word within the last hour that Steve Rattner was stepping down as car czar, my first reaction was that the other shoe is about the drop in the sweeping pension fraud case in New York and New Mexico that has entangled Rattner and his former investment firm, Quadrangle. But the Treasury Department's announcement and the media coverage seems very focused on this being a natural move now that Chrysler and GM have emerged from bankruptcy, with the pension fraud case being a minor mention (if mentioned at all). Maybe my muckraking antenna are oversensitive. Then again ...