By Chelsea James, Dave Weigel & Holly Bailey @ WashingtonPost.com, Aug. 21

ALTOONA, Iowa — Sen. Bernie Sanders announced a key change to his Medicare-for-all insurance plan Wednesday, a move meant to assuage fears on the part of organized labor, whose support is being heatedly sought by all of the candidates for the Democratic presidential nomination.

Labor representatives have expressed concerns to candidates publicly and to campaign staffs privately that a single-payer system could negatively affect their benefits, which in many cases offer better coverage than private plans. The change announced Wednesday would effectively give organized labor more negotiating power than other consumers would have under his plan by forcing employers to pay out any money they save to union members in other benefits.

One of the primary concerns union members and leaders have raised about Sanders’s Medicare-for-all plan is that they negotiated health-care coverage under the current system, in some cases ceding salary in exchange for those benefits [....]