This is one of those sketches that really don’t have to exaggerate too much in order to be funny – some of John McCain’s real ads are pretty much this ridiculous.
It’s interesting that the sketch shows McCain sort of naively going along with the misleading ads. There’s this narrative out there that McCain really still is a nice guy with integrity, and it’s really the Republican machine that’s dragging him down into the mud, but I’m skeptical of that. John McCain is the one calling the shots of his campaign, and he’s too smart a guy to be tricked by his own advisors into playing dirtier than he wants to. His campaign is running the way it is because that’s how he thinks he can win.