Evidently 63% of Republicans believe Saddam had WMDs in 2003.
The blogger I linked to supported the war and is a self-described conservative so I think his comments are a little over the top.
American politics has always been filled with a ton of misinformation. America has always had idiots. It probably has less misinformation and fewer idiots today than ever before. But it might have more misinformed people who believe strongly that they are not. And that is bad.