I have a memory - which I admit may be a false one - of Rush saying, "But did you know there's a White House dog?" and popping up a pic of Chelsea, complete with a dog howling sound effect. I didn't read that in Franken's book because I've never read one of his retarded books in my life.
I'm not going to spend a lot of time looking for it, and I'm okay with saying that it never happened. That one incident, even if true, certainly doesn't even out the dogpile on Barron Trump that's been going on with these freaks, so it's somewhat moot.