AUTOS

More Canadian Auto Workers Expected to Strike: About 4,600 more Canadian Auto Workers are expected to join the strike against General Motors of Canada, making further layoffs possible at GM plants on the U.S. side of the border. Workers at plants in the Ontario cities of London, Windsor and Woodstock are scheduled to join the more than 20,000 GM employees already on strike. GM announced no further layoffs Tuesday at U.S. plants. The company on Monday laid off 1,050 workers at a plant in Tonawanda, N.Y., and 800 workers at a plant in Ypsilanti, Mich., saying the parts they make for Canadian plants aren’t needed.