This is a two-part episode. Linus is running for class president. You might have also seen this segment in You're Not Elected, Charlie Brown, which I also have on this site. But anyway, Lucy has Linus be nominated, and becomes his campaign manager, getting votes any way she can. Linus appeals to everyone, teachers, students, and dogs. He chooses Charlie Brown to be his vice president, and is riding high in the polls.Then, just before the election, he makes the mistake of talking about the Great Pumpkin. When asked why, he replied that it was a week before Halloween and that he had an obligation to tell everyone.