I guess I would characterize Nader as a professional contrarian, and a damned good one at that. I've not looked into his reasons for running, but he and any one else willing to think, plainly knows he has no chance of winning. Personally, I think he has and does make a worthwhile contribution to the body politic, whether I agree with him or not on any particular issue. When you look at voter registration dat from most anywhere in the US, the fact that is evident, and surprising to many, is that we seem to be moving slowly but steadily away from the classic two-party system. Here in FL, registered "Independants", the largest single grouping other than Ds and Rs, typically vote Republican, and there are Democrat strongholds that consistently vote Republican in national elections. That is thought to be a case of the local party operation being very strong, by tradition and organization, but its members feeling a greater kinship with the "other" party. The bottom line, I think, is that the various "others" have reached (or nearly so) a sufficient mass that they can no longer be safely ignored. So, who's going to win in November? Hmmm! Think I'll take by betting money and buy a pint instead.