Federal labor regulators said that Amazon had illegally barred off-duty employees from work sites and that the policy was aimed at union backers.

Nearly a year after its victory on Staten Island, the Amazon Labor Union is grappling with election losses and internal conflict.

New evidence shows that many employers are mislabeling rank-and-file workers as managers to avoid paying them overtime.

The decision cited “egregious and widespread misconduct,” including illegal monitoring and firing of workers. Starbucks signaled that it would appeal.

President Biden’s choice to lead the Labor Department is the deputy to the incumbent, Martin J. Walsh, who is leaving the administration.

After barring Starbucks from firing any U.S.-based worker over labor activity, a federal judge said he had erred and limited the action to one store.

The National Labor Relations Board said severance pacts requiring confidentiality and nondisparagement violated a law on collective worker activity.

A nationwide injunction restrains the company from dismissing labor organizers and could help reinstate ousted workers more quickly.

Martin J. Walsh, a former mayor of Boston, was regarded as an unusually visible labor secretary.

The ruling, on charges brought by the National Labor Relations Board, involved actions at two Staten Island warehouses before union votes last year.