A majority of caucusgoers could be persuaded to change their minds, but Trump supporters are more set

Among likely Iowa Republican caucusgoers.

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Respondents (406 likely Iowa Republican caucusgoers) were contacted Aug. 13-17 with a margin of error of plus or minus 4.9 percentage points. Among Trump voters, the margin of error is plus or minus 7.5 percentage points.

Source: NBC News/Des Moines Register/Mediacom pollCreated with Datawrapper