Borderlands is a weekly rundown of developments in the world of United States-Mexico cross-border trucking and trade. This week: Canada remains top US trading partner ahead of Mexico; Texas group acquires heavy-haul carrier United Vision Logistics; GM plans to expand electric vehicle production in Mexico; and Chinese manufacturer announces first plant in Mexico. Canada still top US trading partner ahead of Mexico Canada ranked as the United States’ top trading partner for the second consecutive month in November and stands No. 1 overall year to date, according to the most recent data from the U.S. Census Bureau. Mexico ranked No....