It’s a shame that “Saturday Night Live” is on its annual summer break. Otherwise, we’d laugh about the show ignoring the scandals coming out of the Graham Platner camp. Except it’s not actually funny. Once upon a time, when a politician stepped on a rake, a crush of comedians would rise up to tease them. That fueled late-night king Johnny Carson’s decades-long reign, among many others. Carlin. Sahl. Klein. Miller. Bruce. Politicians, in turn, ha…