The attempts by Clinton-backers to suppress caucus turnout (and the Clinton camp's unwillingness to condemn it) that Dana pointed out is especially problematic in light of Clinton's very recent lamentation that caucuses result in the "disenfranchisement" of voters:
"You have a limited period of time on one day to have your voices heard," Clinton, D-N.Y., said. "That is troubling to me. You know in a situation of a caucus, people who work during that time -- they're disenfranchised. People who can't be in the state or who are in the military, like the son of the woman who was here who is serving in the Air Force, they cannot be present."
Right before Iowa, she was on the Today show complaining about how caucuses stifle women voters. So for her campaign to not condemn attempts to make caucusing more accessible to women, people of color, the working class, etc., is at best negligent. At worst, it's granting permission for attempts to keep away from the caucuses voters who seem likely to go for Obama.