Oh is that right? Your past behavior should always follow you? Gee that's not what the Huck used to preach before he decided going into politics.
Looking at a politician's past record is an excellent predictor of his future behavior just like looking at a racehorse's past performance is indicative of future performances. Once a horse has developed a chart with several performances going back sometime, he seldom rises above his best past performance. I believe the same can be said about a politician.