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Republican field narrows as Iowa caucus knocks out candidates

The historically large Republican presidential field, which peaked at 17 candidates in August, is narrowing fast.

Kentucky Senator Rand Paul rests during a break in a Republican Presidential debate at the Iowa Events Center in Des Moines, Iowa, Jan. 28, 2016. (Photo by Jim Lo Scalzo/EPA)
Kentucky Senator Rand Paul rests during a break in a Republican Presidential debate at the Iowa Events Center in Des Moines, Iowa, Jan. 28, 2016.EPA

Benjy Sarlin