Don't get me wrong; I do find it rather irritating that the system for determining eligible voters has become so needlessly (and sometimes even intentionally) muddled, and I think it's outright embarassing when incompetence, maliciousness, or some combination of the two is allowed to interfere with the normal process of an election. But at the same time, I see no inherent value in dredging up details of one of the most polarized elections in modern American history, particularly when any discoveries would be completely discredited by those they fell against and wouldn't have any effect on the eight ensuing years anyway. Also, I'm not too proud to admit that, since the person I desired to win that election wound up doing so, I have a bit of a personal vested interest in not finding out if he did so illegally (though what the alternative would have been is an interesting prospect, eight years in retrospect).
And I think the reason that most people here are so apathetic about it is because of the very fact that it's become ingrained as part of the idea of the dirtier side of politics. I'm quite certain that you could point to just about any election in American history and pick out at least one locale where some sort of alleged fraud ensued; hell, the entire city of Chicago has had that reputation for more than a century now (and indeed, there's been a long-running joke about dead Chicagoans voting for JFK in 1960). It's hard for people to become incensed about activities that occur election after election but normally don't have a game-changing impact. The 2000 election was a massive exception in the grand scheme of things; few presidential elections have come down to the electoral votes of a single state, and perhaps no previous election has been decided by such a small popular vote in said state. People have the idea that "the system works things out," and since any attempt to dig any deeper generally involves the ever-undesirable accusations of partisanship, there's an idea of letting sleeping dogs lie.
(Also, I find it rather unlikely that we're the only democracy out there that's prone to backhand dealings at at least some level, but that's nothing more than conjecture.)
As a random side note, Nixon's resignation had nothing to do with voter fraud; indeed, he won in a landslide rarely seen in presidential elections, in which any sort of localized voter fraud may have had no impact. The Watergate break-in and ensuing scandal were more symptoms of Nixon's paranoia and desire to keep tight control over his political enemies. But hey, at least he made for a hell of a Futurama character a long way down the road.