After pleading his case on air to right-wing talk show host Birch Barlow, Sideshow Bob is released from prison. Soon, Bob is announced as the Republican candidate for mayor of Springfield. Bart and Lisa help campaign for Mayor Quimby but despite their efforts, Bob wins the election with a landslide majority. Within days, the Simpsons awake to find that their house will soon be demolished to make way for the planned Matlock Expressway. Bart and Lisa begin to suspect that Bob somehow rigged the election. While searching through the voter records, Lisa is left a message by someone who claims to know what actually happened. The whistleblower turns out to be Waylon Smithers, who dislikes some of Bob's policies. He gives Bart and Lisa the name of a man who voted for Bob, but had really been long dead. The pair discovers that virtually every single person who supposedly voted for Bob is actually dead. At the trial, Bart and Lisa trick Bob into confessing his crime, and he is put back in prison.