As Minister for Magic, Parkinson attempted to pass legislation making it illegal to marry a Muggle, carrying on the anti-Muggle policies of his predecessor, Damocles Rowle. This stance had become unpopular and Parkinson was voted out of office (Pm).
The Wizarding community votes Perseus Parkinson out of office
Certainty Stated in canon
Location in Canon Pm: Pottermore
Type of Event Wizarding world