Many union workers really love their health benefits. That’s a problem for Bernie Sanders.

(CNN)Health care benefits are really important to many union workers — important enough to give up pay raises or even to walk off the job to keep the coverage they’ve negotiated. Still other unions, such as the Service Employees International Union, say they support all efforts to expand coverage to more people. Roughly 10.5% of workers — or 14.7 million people — were union members in 2018, according to the Bureau of Labor Statistics. That’s about half the share that were unionized 35 years earlier. Some 95% of union workers had access to employer medical benefits in 2019, compared to 68% of non-union workers, according to the bureau’s data. And they were more likely to participate in the plans, with …