Trump NLRB’s Union Email Rule Gets Legal Test in T-Mobile Case

A federal appeals court in Washington, D.C., will weigh whether T-Mobile Inc. unlawfully disciplined a worker for sending a union-related email, testing the boundaries of the NLRB’s Trump-era legal standard for employer restrictions on email use.

During oral argument at the U.S. Court of Appeals for the District of Columbia Circuit on Friday, the National Labor Relations Board will defend its ruling that T-Mobile didn’t unlawfully discriminate against a worker for sending a mass email to her colleagues to invite them to meet and talk about forming a union.

The Communications Workers of America challenged the NLRB’s decision, arguing that ...