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DES MOINES, IA - JANUARY 31:  Democratic presidential candidate, former Secretary of State Hillary Clinton greets supporters during a "get out to caucus" event at Abraham Lincoln High School on January 31, 2016 in Des Moines, Iowa.  (Photo by Justin Sullivan/Getty Images)
DES MOINES, IA - JANUARY 31:  Democratic presidential candidate, former Secretary of State Hillary Clinton greets supporters during a "get out to caucus" event at Abraham Lincoln High School on January 31, 2016 in Des Moines, Iowa.  (Photo by Justin Sullivan/Getty Images)

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Clinton campaign confident, anxious ahead of Iowa votes

Brianna Keilar reports.

Clinton campaign confident, anxious ahead of Iowa votes

Brianna Keilar reports.