Clinton trying to hold her superdelegates

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We all know that Clinton has a lead in superdelegates. Well, apparently her finish in Iowa may be causing that solid block of support to crumble, setting off a crisis in Clinton land:

The scope of Barack Obama's victory in Iowa has shaken the Clinton machine down to its bolts. Donors are panicking. The campaign has been making a round of calls to reassure notoriously fickle "superdelegates" — elected officials and party regulars who are awarded convention spots by virtue of their titles and positions — who might be reconsidering their decisions to back the candidate who formerly looked like a sure winner.

We'll report any superdelegates who withdraw their endorsement. And keep on eye on Bill Clinton, who himself is a superdelegate. If he withdraws his support, then we'll know she's in trouble!