The article in Zombietime, The Left's Big Blunder, is about the famous Asch experiments on conformity.
Obama supporters presume that increasing Obama's perceived support will induce informational conformity in the American public. In other words, Obama supporters operate on the assumption that individual McCain supporters or undecided voters will in actuality change their minds about who to vote for if they perceive that a majority of people are supporting Obama. The imagined line of thinking is, "Gee, if so many people like this Obama guy, then my impression of him must be wrong; I trust the group's wisdom more than my own impressions."
I suppose the Dems' efforts to portray Obama as inevitable and wildly popular are an effort to exploit the conformist tendencies in people, but this seems rather usual in politics. However, the article offers a good depiction of how conformity can distort our thinking and cause us to doubt ourselves and our lyin' eyes.
The desire to fit in and to be accepted is strong in all of us. It's important for survival, but we need to try to make room for thinking for ourselves too, based on our experience and not on received opinion.