Questions rise over primary polls following Michigan, Wisconsin upsets

3 reports in the order each was filed. Tap any entry to open that report at its source.

1. 01The HillAug 13, 11:15 AMQuestions rise over primary polls following Michigan, Wisconsin upsets
2. 02The HillAug 13, 11:15 AMQuestions rise over primary polls following Michigan, Wisconsin upsets
3. 03CNBCAug 13, 12:30 PMWisconsin, Michigan primaries expose limits of polls and prediction markets