We have no idea if that's true.
Well, considering that there's absolute zero evidence (feverish rantings by DUmmies and Kos don't count as evidence) that it isn't true, I hope you'll forgive me for assuming that it is. If the evidence situation changes, then I'll be open to changing my opinion. Until then, the cases have nothing in common.
I will also note, as an aside, that the main thrust of comments at FR about McGreevy wasn't that he was having a gay extra-marital affair, but that he used that affair to distract from the corruption and influence-peddling issues that were starting to come to the surface. McGreevy played the "gay card" to avoid criticism for abuse of power...
We have no idea if that's true.
Sooooooo, you're saying he was there because of his background? Oh, who was his lover...are you going with McClellan or straight to the top DUmmie dream come true of GWB? Do tell us how you come to this learned thought.
Good grief.
I'd say it's a pretty safe bet that his past was completely unknown to anyone in the adminstration.