IOTL, Perot won in 1992 with only 45% of the popular votes. It is a little known fact that he considered dropping out of the race on the eve of the Democratic convention. I know he wasn't a popular President after leaving office, but he did show that an independant can win, so I consider him the most important candidate of the twentieth century. Without him, the two parties would never have lost their stranglehold on power.