Before Nader most unwisely decided to 'run' (and afterwards disappear) again, electronic vote fraud and manipulation was considerably more difficult. Diebold would have had to subract Kerry votes and either
--add them to Bush (which would create a suspicious last minute swing),
--or spread them around to lesser third party candidates (unworkable in great numbers),
--or just subtract them, and leave it at that (creating suspicious low turnout).
But now that Nader has entered the race, electronic vote redistributions have been made all the more easier. It will be much simpler to electronically subtract Kerry votes and add them to Nader, thereby throwing key close races to Bush.
Who will argue if Nader gets comparable numbers to 2000, though the reality is that much fewer Nader supporters plan on voting for him? Who also will argue with the media spin that people never really latched onto Kerry and thus voted for Nader? Without paper, voter-verifiable, manual-recount-enabled voting machines, noone will be able to argue or dispute anything.
Particularly devious voting software will make use of a Nader candidacy in ADDITION to the three aforementioned vote manipulation methods above. Therefore, when all FOUR methods of electronic vote fraud are enacted, no ONE in particular will stand out, and you then have an undisputed president.
This does not even take into account the non-electronic vote manipulation methods of which I am less familiar, though they are likely more prevalent, such as clearing voter rolls in key counties, roadblocks, pre-filled-out absentee ballots, etc.
Thus, when one combines the electronic and non-electronic vote manipulation that can and will occur if the people aren't wary, a disturbing, scary picture emerges in which one cannot be sure that one's vote counts anymore.
Though noone denies Mr. Nader his right to run again (even if he singularly may become responsible for 8 years of pure evil infecting America), there can be no doubt that his entrance will make it substantially easier for vote fraud to go unnoticed.