It was Theresa May who once said that many people called the Conservatives the "nasty party." She knows just how nasty the party can be. The Conservatives have a habit of trying to ditch their leader when the going gets tough; the downfall of Margaret Thatcher was especially brutal. While many Conservative members of parliament will claim that she was their greatest leader since Winston Churchill, they forget to mention that she was ousted not by the Labour Party but by her own MPs. Former prime minister John Major famously slammed some of his eurosceptic MPs for being "bastards" as they tried to topple him.