In a conference call this morning, Obama's campaign manager, David Plouffe, announced that the campaign was endorsed by Gordon Fischer, the well-regarded former chair of the Iowa Democratic Party.

But that really wasn't the reason for the conference call. Rather, the campaign wanted to give Plouffe and Fischer a chance to explain Obama's caucus strategy for reporters.

"We need to couple the grassroots enthusiasm we have with people who know how to do the caucus," Plouffe said.

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