Given that the left has been pushing the "Iraq-is-a-Vietnam-like-quagmire" storyline since about May 2003, I found this passage in Dan Balz's article today discussing the potential political implications of a Lamont victory for the antiwar left rather humorous:

Still, many party moderates say they see worrisome parallels to what happened to the Democrats during Vietnam, when they opposed an unpopular war but paid a price politically for years after because of a perception the party was too dovish on national security. [snip]

But leaders of the net-roots activists, and some party strategists, argue that as antiwar sentiment spreads Democrats stand to gain politically by aggressively challenging Bush's war policies. Parallels to Vietnam are inaccurate, they say, because of the nature of an Iraq war that has become a low-level sectarian civil war. [italics added]

In other words, Iraq is Vietnam, except when it isn't. We'll know soon enough whether the netroots are the cutting-edge of antiwar activism sweeping the nation or, to paraphrase Marshall Wittmann, just a bunch of "McGovernites with modems."