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Nearly 70% of ad dollars in 2016 race come from outside groups

Eighty-three percent of the Republican ad dollars, especially in early states like Iowa and New Hampshire, have come from Super PACs and other outside groups.

A Ben Carson campaign billboard is seen in Des Moines, Iowa, Nov. 15, 2015. (Photo by Alex Wong/Getty)
A Ben Carson campaign billboard is seen in Des Moines, Iowa, Nov. 15, 2015.Getty Images

Mark Murray