Hmm. Yeah, I need to elect someone in his place. Sorry, I'm not giving enough information. The candidate is disasterously stupid, but is a popular figure around Boston and has a very effective puppet master. After an embarassing incident makes it clear there's no way for the former front runner to win the election, the puppet master offs him and turns the incident into a story that turns public support back toward the now-dead candidate (it's believed the candidate died of an acute illness). What I really want to do is run the puppet master, who has a long history in Massachusetts politics himself (but never as a candidate or elected official), in his place.
If that strains credibility, I could allign the villain with the next candidate. It'd be less fun, though.