Rufus Scrimgeour was elected the Minister of Magic after the resignation of Cornelius Fudge. Scrimgeour was the Head of the Auror Office before becoming the Minister of Magic. Cornelius Fudge had to resign from his post after significant pressure poured in for his carelessness with regard to the return of Voldemort. Furthermore, he was seen as an incompetent Minister for outright ignoring obvious evidence for the return of Voldemort and investing time and resources in reforming Hogwarts School of Witchcraft and Wizardry rather than strengthening the defences for the oncoming war.