CASPER — Members of a major railroad union voted to reject a tentative contract deal, union leaders announced Monday, renewing the possibility of a strike that could shut down the country’s railroads — and several key Wyoming industries — early next month. 

The deal resulted from last-minute negotiations convened by the Biden administration in mid-September, when tens of thousands of unionized rail workers were readying to strike over working conditions. The agreement added a pay raise, an extra day off, protected benefits and guaranteed leave for medical care (with restrictions) t...