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CEDAR RAPIDS, IA - JANUARY 30:  Supporters look on as democratic presidential candidate former Secretary of State Hillary Clinton speaks during a "get out to caucus" event at Washington High School on January 30, 2016 in Cedar Rapids, Iowa.  With two days to go before the Iowa caucuses, Hillary Clinton is campaigning throughout Iowa.  (Photo by Justin Sullivan/Getty Images)
CEDAR RAPIDS, IA - JANUARY 30:  Supporters look on as democratic presidential candidate former Secretary of State Hillary Clinton speaks during a "get out to caucus" event at Washington High School on January 30, 2016 in Cedar Rapids, Iowa.  With two days to go before the Iowa caucuses, Hillary Clinton is campaigning throughout Iowa.  (Photo by Justin Sullivan/Getty Images)

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    Trump, Clinton lead polls ahead of Iowa Caucuses

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Trump, Clinton lead polls ahead of Iowa Caucuses

On CNN's State of the Union Jake Tapper and the panel discuss the tight race in Iowa.

Trump, Clinton lead polls ahead of Iowa Caucuses

On CNN's State of the Union Jake Tapper and the panel discuss the tight race in Iowa.