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The 1992 and 2000 elections pretty much ended any credible threat to the two-party system for now. The Greens are so much more like Democrats than Republicans they can only grow at the expense of the former. The Libertarian Party is pretty much the mirror image of the Greens, so they cost the GOP more votes than they cost the Democrats. So, in the US, joining a third party reduces the chances for electing any party that's remotely on your side.
The mandarins of the two major parties know that and ignore the third-party voters, who'll probably hold their noses and return to the fold in a close race. That cynical calculation is mostly correct, but it ignores the cost to the GOTV (Get Out The Vote) effort. Party faithful might indeed vote with their party in November, but they won't give money or spare time or even encourage their friends to vote with the party.
The GOP mandarins ignored this in 1992. When they sucked up to the two Pats (Robertson and Buchanan) and ignored "Reagan Democrats'" worries about NAFTA, they lost a huge chunk of votes to H. Ross Perot. They still came close to winning, so they could be forgiven for guessing wrong. Perot's Reform Party didn't seem to have any existence beyond H. Ross Perot, and it slowly collapsed after he lost interest.
In 2000, the Democratic Party (really the Democratic Leadership Committee) were dumber, since 2000 was a much closer race. Nader couldn't possibly get the 8% that Perot got 8 years earlier, but he was a threat. The DLC ingored this and tried the "triangulation" (positioning just to the left of the rightwingers to capture the supposed centrist majority, and also taking the left for granted) that seemed to work in 1992 and 1996. So they got the appalling Joe Lieberman on as VP and spurned the left, and Gore went along with it.
The left's disgust with the Democrats cost them more, I think, than the votes they lost to the Greens. And when the Right hijacked the Florida count, nobody cared enough to fight for the party.
So US third parties, at the national level, are mostly bellwethers of national mood. They're only credible at the state and local level, and only if their candidates care about fixing roads, sewers and schools instead of about being political messiahs. |
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