Portrait of the Artist as a Young Geek

There's some arguments on the subject, most of which can be found scattered through here. Zachary Taylor declined to be sworn in on the day Polk's term expired (it was a Sunday), so there's a standing legal question as to whether he was nonetheless president that day, whether someone else temporarily held the job, or whether it was vacant. (Since it WAS a Sunday, the executive branch wasn't doing anything anyway, so no one needed a president and no one had to figure it out for reasons other than mental exercise.)