The NYTimes today has a story, Partisan Divide on Iraq Exceeds Split on Vietnam
including this factoid: "An analysis by the Pew Research Center for the People and the Press found that the difference in the way Democrats and Republicans viewed the Vietnam War — specifically, whether sending American troops was a mistake — never exceeded 18 percentage points between 1966 and 1973. In the most recent Times/CBS poll on Iraq, the partisan gap on a similar question was 50 percentage points."
But that's not the most surprising thing. Even though I lived through the 60's and should know better, I suspect I'm part of a vast majority of Americans who would say that Democrats started opposing the Vietnam War around 1966. But the Times includes a graph, which I couldn't find on-line, that shows that Dems didn't clearly move to opposition until 1971 (Cambodian invasion I suspect). It's an example of Dan Gilbert's (Stumbling on Happiness) thesis that we reconstruct memory.