My book, "America's Forgotten Majority: Why the White Working Class Still Matters", was termed a key influence on the Gore campaign by everyone from Karl Rove and The Wall Street Journal to Stan Greenberg and The Nation. I have now written an analysis of the 2000 election and where Gore won and lost that has just appeared in The American Prospect. It is available online at:
http://www.americanprospect.org/archives/V11-26/teixeira-r.html
The essay has already been discussed in detail by David Brooks in his essay "An Emerging Democratic Majority?" which just appeared in The Weekly Standard.