As the federal government mandates experimental Covid-19 vaccines for nearly all employees, a record 4.4 million American workers walked away from their jobs in September.According to data published on Nov. 12 from the United States Job Openings and Labor Turnover report, an unprecedented number of Americans in most sectors abandoned their jobs amid pandemic stress and childcare challenges.The number of mass resignations is the highest level since the Bureau of Labor Statistics began measuring the data in 2000.Sectors in which work is done in person and wages are relatively low, particularly in the arts and entertainment industries, saw the highest...