US employers added just 29,000 jobs in September, a sharp drop from last month’s gains, and unemployment rose slightly to 4.2%, a sign of a cooling labor market in the final jobs report before the midterm election.The numbers were under half of economists’ expectations of just under 70,000 new jobs. Most job gains were concentrated in the healthcare industry, which added 17,000 new jobs, while the information, financial and professional industries saw losses, according to the latest data from the US Bureau of Labor Statistics.Earlier jobs figures were also revised down: Initial reports from July and August altogether dropped by 60,000. The labor market contracted by 10,000 jobs in July after revisions, while August saw 133,000 jobs added.Growth in average hourly earnings slumped to 3%, the lowest rate in over five years.The unemployment rate has remained relatively steady since last year, when it hit 4.5% in November. US jobless claims also inched lower for the fourth week in a row,...