[Iowa Granny]

And I heard something about if there aren't enough of a particular candidates' voters they have to LEAVE, could that be right?

If a particular candidate doesn't have 15% of the people who have signed in to that precinct caucus, they may move to another candidate's corner or leave. They ARE NOT required to leave. (This is a Dem rule, only. Pubbies do not require people to select a Second Choice or leave)

[Howlin]

You mean, say, that if a precinct doesn't have enough Edwards' delegates, those delegates have to pick another candidate?