Doonesbury: Arnold is a Nazi and a rapist.
Of course, being a liberal, he can say pretty much anything he wants and nobody cares. Imagine the response if a conservative commentator referred to Ted Kennedy as "Comrade Kennedy" or "The Commissar."
Bill Clinton was depicted by Trudeau as a floating waffle, apparently reflecting what Trudeau saw as his most negative aspect. I suppose no one would have printed his cartoons if Clinton was pictured as an immense schwanszstucker.