Iowa has a spotty record at picking the president, particularly for Republicans. Check out the interactive maps below to see a county-by-county look at results for the past six caucuses.

Iowa has a spotty record at picking the president, particularly for Republicans. Check out the interactive maps below to see a county-by-county look at results for the past six caucuses.

See results from every precinct and demographic analysis of the vote in the Iowa G.O.P. caucuses.

Iowa has a spotty record at picking the president, particularly for Republicans. Check out the interactive maps below to see a county-by-county look at results for the past six caucuses.

Iowa has a spotty record at picking the president, particularly for Republicans. Check out the interactive maps below to see a county-by-county look at results for the past six caucuses.