Ohio voters head to the polls in a toss-up contest, a last dress rehearsal for the midterm election

Ohio voters head to the polls in a toss-up contest, a last dress rehearsal for the midterm election

Two types of voters have gotten out-sized scrutiny in the run-up to this year’s midterm election — blue-collar whites who moved to Donald Trump in 2016 and college-educated suburbanites who have shunned the president ever since.

Ohio’s 12th Congressional District has big batches of both, which...