Do Democrats have credibility on the Iraq war?

I followed my e-mail links to these results from last week's survey from The Polling Station, and received a little bit of a shocker.

I'd rather assumed that partisanship was going to be clearly evident from top to bottom between the Republicans and the Democrats, on the handling of the Iraq war. The results from the respondents who affiliated themselves with the Republican party did not surprise me, seeing as how there is great enmity these days (okay, it surprised me that there were almost 8% who didn't absolutely believe the Dems were idjits). And, Independents, being largely libertarians and other assorteds I've talked with don't think either party has a lock on credibility, so having more than half of them say the Dems weren't credible... that's another dog bites man thing.

But that nearly half the Democrats who responded didn't absolutely believe their own party was credible... I find that almost incredible (I said so in their blog comments, too). I view this as very troubling. Are we truly looking at a party schism, or are we simply seeing a severely jaded electorate, who will continue to vote for people they don't believe in, simply because it is expedient to vote straight-party?
Either way is an unhealthy direction for a democratic republic to wander.

If the schism occurs, we will have one very strong party which will be able to run roughshod over the country as it pleases. That, I think all will agree, is damaging to liberty. If, on the other hand, a large portion of the electorate no longer cares about the quality of representation, it speaks poorly for humanity as a whole. Such an attitude would mark the decay of a great society.