Nader created a good deal of the antipartisan organizational apparatus of the 1970s and 1980s. What he did in his career was remarkable, and yet, now on TV he's taking no responsibility for his lies during 2000. Watching him on TV, it's clear he hates the Democrats and just won't recognize that it's a different Democratic Party, one that is much more movement-based, than it is when he ran in 2000. Nader is part of the TV cult of personality model of politics, similar to Dennis Kucinich, and he sounds kind of pathetic.
Nader's not wrong on a lot of his charges, but he's also in his own increasingly irrelevant way part of the problem.
UPDATE: Perhaps some more pungency makes sense - I don't see Nader as particularly progressive, and I do see him as a pathologically dishonest diva. That shouldn't take away from his very real accomplishments, but his claims in 2000, that there were no differences between Al Gore and George Bush, were lies and he is appropriately held accountable for them. As for his ideological stripes, Nader was on the wrong side of the Schiavo controversy, and that suggests a basic lack of concern for how to treat human beings. Working with religious wackos to invade someone's privacy at their most vulnerable moment, and lying about the Democratic Party to put George Bush in charge and hewing to those lies are not ok in my book. I did enjoy this video.