Tesla Inc. has fought off allegations it illegally terminated dozens of New York employees in response to a unionization campaign.

Amazon.com Inc. was accused by U.S. officials of violating a labor board settlement, paving the way for the government to consider claims that the company tried to suppress union organizing.

National Labor Relations Board General Counsel Jennifer Abruzzo pledged to pursue legal action against employers who require nonsupervisory employees to sign noncompete agreements.

Amazon.com Inc. violated federal labor law by unilaterally changing policies and terminating union supporters at its sole unionized warehouse, U.S. labor board prosecutors allege.

Nissan North America technicians in Tennessee voted against organizing under the Machinists union, the latest defeat for unionization efforts at foreign automakers in the U.S. South.

Tesla Inc. terminated dozens of employees Feb. 15 at its plant in Buffalo, N.Y., one day after Autopilot workers at the facility announced a union campaign, organizers said in a complaint.

A group of around 86 Nissan North America Inc. technicians at a Tennessee manufacturing plant can vote on unionization, the U.S. labor board ruled.

Amazon violated federal labor law as part of its efforts to resist unionization at two facilities in New York City, a National Labor Relations Board judge ruled.

Amazon .com Inc. violated labor law when it fired two high-profile internal critics last year, the National Labor Relations Board’s prosecutors have found.

DETROIT — Tesla CEO Elon Musk has tweeted his way into trouble with another federal agency, this time the National Labor Relations Board.