Wendy Leigh, who wrote an unofficial biography on Schwarzenegger, claims he plotted his political rise from an early age using the movie business and bodybuilding as building blocks to escape a depressing home. Leigh portrays Schwarzenegger as obsessed with power and quotes him as saying, "I wanted to be part of the small percentage of people who were leaders, not the large mass of followers. I think it is because I saw leaders use 100% of their potential – I was always fascinated by people in control of other people." Schwarzenegger has said that it was never his intention to enter politics, but he says, "I married into a political family. You get together with them and you hear about policy, about reaching out to help people. I was exposed to the idea of being a public servant and Eunice and Sargent Shriver became my heroes." Eunice Kennedy Shriver was sister of John F. Kennedy, and mother-in-law to Schwarzenegger; Sargent Shriver is husband to Eunice and father-in-law to Schwarzenegger. He cannot run for president as he is not a natural born citizen of the United States. In The Simpsons Movie (2007), he is portrayed as the president, and in the Sylvester Stallone movie, Demolition Man (1993, ten years before his first run for political office), it is revealed that a constitutional amendment passed which allowed Schwarzenegger to become president.