Iowa caucus entrance polls: How big a role did late deciders play?

Just last week – after months filled with thousands of campaign ads, and almost as many Pizza Ranch campaign stops - nearly half the likely Iowa Republican caucus-goers in the CNN/Time/ORC survey said they still hadn’t decided which candidate to back tonight (or that they had, but still weren’t completely sold on their choice.)

Tonight, 19 percent of the voters in early entrance polls made their picks in the past month; another 25% made the call in the past few days; and 15 % say they made the decision today – if those numbers hold, that could mean there were fewer late-deciders overall than there were four years ago, when those numbers were 31, 23 and 17.

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