Among the vexing challenges facing the middle class is one that will probably go unmentioned in the next presidential campaign: What happens when the robots come for their jobs?
Don't dismiss that possibility entirely. About half of U.S. jobs are at high risk of being automated, according to one recent study. And the middle class may be disproportionately squeezed. Many lower-income jobs, such as gardening or day care, don't appeal to robots.
