How to Avoid Utter Embarrassment at the Iowa State Fair, as a Presidential Candidate

DES MOINES, Iowa—Republican presidential hopefuls are now barnstorming early voting states, answering voter questions at town hall meetings and trying to win over enough donors to qualify for the first debate.

None of that may compare to the political obstacle course that is the Iowa State Fair, which starts Thursday and is expected to attract a dozen or so presidential candidates.