Clips from three speeches on Tuesday night, compiled by TalkingPointsMemo. I think this says it all.
TPM also has the news on its website that Sen. Russ Feingold, who I believe is the conscience of the US Senate, said that he voted for Obama in the Wisconsin primary and is most likely to support him as a Superdelegate. Feingold had specifically declined to endorse before the primary.
Thanks to M.E.R., the superdelegate of my heart, for passing this along: