Washington Post reporter Michael Fletcher, in an online Q&A:

non-election question: Given Liz Cheney's sudden prominence (man, nepotism in DC never ceases to amaze me), I'm curious as to why none of you reporters are asking her questions re: her recent comments about Obama's trip to Dover. She said that Bush routinely made the same trip and didn't “stage photo ops.” A) she flat out lied - Bush never went to Dover, B) he couldn't have had photos taken because of the Pentagon policy at the time and C) Mission Accomplished, anybody? Ultimate photo op. What gives? Or is being related to Dick sufficient to protect her from questioned?

Michael A. Fletcher: If we begin questioning Liz Cheney that way, then we would have to do the same with conservative (and liberal) commentators who make all kinds of charges every day. It is their way of making a (great) living. Some comments, I like to think, sink under their own weight.

So a Washington Post reporter says the media doesn't question Liz Cheney about her lies because if they did so, they would have to do the same with other commentators.

What's missing? Any explanation of why that would be a bad thing.