A more interesting and important national trend is also emerging:
In 5,566 interviews with registered voters conducted by the Pew Research Center for the People & the Press during the first two months of 2008, 36% identify themselves as Democrats, and just 27% as Republicans.The share of voters who call themselves Republicans has declined by six points since 2004, and represents, on an annualized basis, the lowest percentage of self-identified Republican voters in 16 years of polling by the Center.
I think its worth noting that on top of the Presidential Election in 2008, 84 state legislative chambers in 43 states will be up for election as well. A strong Democratic performance could significantly alter the political landscape for the next decade because these legislatures will be drawing the district lines in 2010!
The real news Independents 40%
Dan is correct, based on these numbers. The defections from the Republican party are not growing the Democratic Party by an equal amount. Hence, the overwhelming majority of the voters who are disaffected by the "extreme partisanship" of the Republican Party don't see the Democrats as an attractive option.
That is an important distinction. If the Democratic Party doesn't heed the message, then they will begin to hemorrage membership to the Independents as well.
What these numbers tell me is that the Republicans are winning the race with the Democrats to see which party will be replaced by a successful Third Party movement. The Big Tent era of the Reagan Republicans is over and they now have more litmus tests for faithful membership than a graduate chemistry class. Democrats should not yield to their more liberal wing and make the same mistake in reverse. You can be a faithful Democrat and still be pro-life, or in favor of gun rights, or in favor of enforcement of immigration laws.
The Democratic Party has also built a substantial edge among independent voters. Of the 37% who claim no party identification, 15% lean Democratic, 10% lean Republican, and 12% have no leaning either way.
Yes, GOP leans have remained stable, and Democratic leans have declined, but that decline clearly tracks Democratic ID.
Honestly, to suggest that the controversial years of Clinton and the subsequent Hillary candidacy would come close to having the same effect on the electorate as eight years of corruption, incompetence, and just general idiocy of Bush and Cheney belies common sense.
Why belies "common sense" here, as you define it, is statistical proof.
Looking at the chart Lowell provides, you look at the number of Leaners as demonstrating a wash, i.e., that the data reflects neither a drift toward the Democrats or the Republicans. You conclude this is due to negativity in the electorate toward Bill and Hillary Clinton as balancing out negativity toward Bush.
I'm not trying to put words into your mouth, but that is what I think you are saying.
My point was if you look at both graphs, the decline in independents who lean Democratic can be explained by some of those leaners finally falling over -- onto the Democratic side. In the meantime, way fewer voter are self identifying as Republicans, and arguably now see themselves as independents who lean GOP, keeping that number stable, but now including a greater percentage of formerly solid Republicans.
I wouldn't so much call those assumptions on my part as one possible interpretation to be drawn from the data. There are, of course, others. But the data most certainly does not "prove" your conclusion.
As for what "belies" common sense, it is your conclusion about the equivalence between the Clintons and Bush. The Bush presidency is a failed administration that more or less has hit rock-bottom, its remaining support mainly consisting of dead-enders.
You might not like Bill Clinton, and you might think Hillary is the she-devil, and no presidency is all good or all bad, but it requires a pretty jaundiced view to see the Clinton administration as a failed presidency.
Man, that made me thirsty!