Surely this has been pointed out already, but the WaPo seems to have put a lot more effort into their investigation of Marco Rubio's family narrative than they have on Obama's family narrative. Along with the major story they've had a series of followup critiques from their ombudsman, keeping the issue alive.
Meanwhile Jack Cashill and a few others could stand naked on the Capitol steps asking the WaPo to do a little digging into Obama's family history and get nothing but back page coverage in the police blotter. Guess it's more important to expose the truth about an up-and-coming conservative Latino whose name has been mentioned as a possible 2012 VP nominee than of the Commander-in-Chief, who will also be running in 2012.
Not to say they shouldn't be doing their job to root out embellishments, half-truths and lies from those who run for office, only that it should be consistent. Surely they wouldn't want anyone to think they are less than objective.