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Railroad engineers accepted their deal with the railroads that will deliver 24% raises but conductors rejected the contract, casting more doubt on whether the industry will be able to resolve the labor dispute before December’s deadline.

FedEx Corp. defused a threat by its delivery contractors to walk off the job on Black Friday in protest of dwindling profits as a trade group representing disgruntled logistics company owners disbanded.

A second railroad union rejected its deal with the major U.S. freight railroads on Oct. 26, reflecting workers’ increasing frustration with the lack of paid sick time in the industry and adding to concerns about the possibility of a strike next month that could cripple the economy.

Puerto Rico’s largest truck-driver’s union began an indefinite strike July 21, demanding increased cargo rates on the island where 80% of all food is imported.

The United Auto Workers will continue striking against General Motors Co. until a tentative deal is ratified by members, extending its walkout for at least another week.

Amazon.com Inc. warehouse workers in Minnesota plan to strike during the online retailer’s summer sales extravaganza, a sign that labor unrest persists even after the company committed to paying all employees at least $15 an hour last year.

Workers at a major auto parts plant in Michigan are poised to return to work after a brief strike June 21, alleviating the threat of a supply disruption for carmakers Ford Motor Co., Tesla Inc. and Fiat Chrysler Automobiles NV.

RIO DE JANEIRO — The president of Brazilian state oil company Petrobras resigned June 1, the latest fallout from a crippling truckers’ strike over fuel prices that has widespread implications for the future of Latin America’s largest economy.

Canadian Pacific Railway Ltd. reached a tentative four-year deal with the Teamsters Canada Rail Conference, ending a strike that began late May 29.

Brazilian cabinet ministers on May 28 called on truckers to end a crippling eight-day strike that has led to major shortages and disruptions in Latin America’s largest nation, saying the government had gone as far as it could to meet their demands.