Incisive election commentary

I enjoyed watching the election-coverage programs with my mom. A dependable liberal Dem, she manages to combine strong partisanship with unshakable politeness.  Thus, I was surprised by the following exchange.
Well-behaved em mom: “It’s time for McCain and his funny little arms to get off the stage.” 
em: “I know! What is with those arms?? They’re like robot arms that can’t bend! ”  
Well-behaved em mom: *Scolding* “His arms were injured during his POW imprisonment. They strung him up by them for days.”
em: *Guilty* “Oh. Well that’s just awful.”
Well-behaved em mom: “None of that means he can govern effectively for anyone other than those in the upper class. Anyway, they’re more like Tyrannosaurus Rex arms.”
em:  “Or short little fetus arms.”