Kermit the frog a muppet character created in 1955 and was the host of "The Muppet Show". Kermit was as big star on the "Sesame Street" TV show and has since featured on many other television series, films, public service announcements and has a hit single called "Bein' Green".
Kermit is known to be a friendly guy and considered to be a natural leader of the fellow muppets; He tries his best to keep everyone together A lot of people would say that he has a way of turning the most ordinary things wonderful. He's easy going and despite his introverted nature, his charisma draws people to him. More about Kermit on Wikipedia
Kermit and Miss Piggy's top campaign platform would be television. Because their careers have started and still are continuing on TV, I think their audience is most likely to watch their campaigns if they aired on TV.