Will Baude points to this David Brooks column that elevates describing “big mo” to the status of high art. What strikes me most about the process is how completely endogenous it is—everything feeds back onto everything else, starting with the trigger of the otherwise-completely-meaningless behavior of several thousand Democratic caucus-goers in Iowa. In 12 days, John Kerry was translated from being a virtual also-ran to the likely Democratic presidential nominee largely due to the unanticipated behavior of said caucus-goers.

Could the momentum shift yet again? Probably not, with the Dean campaign imploding before our very eyes, Edwards fighting for traction in South Carolina, Lieberman in abject denial, and Clark scrambling for votes in Oklahoma. Kerry may yet fall victim to interneccine attacks, but his rivals’ campaigns may not persist long enough for them to be effective.