Voter frustration over affordability fueled Democratic wins in last week’s state and local elections, and on top of that, Americans are becoming uneasy about the job market too.Some 55% of employed Americans say they’re concerned about losing their jobs, according to a recent Harris Poll conducted for Bloomberg News. That angst follows a drumbeat of layoff announcements by major employers, including Amazon.com Inc., Target Corp. and Starbucks Corp. Outplacement firm Challenger, Gray & Christmas Inc. calcula ...