It looks like the trains may stop running on time for Christmas. On Monday, the SMART Transportation Division (SMART-TD), the largest railroad union in the country, narrowly voted down a contract offered by the White House. That means the possibility of a strike just in time for the holiday season. The SMART Transportation Division, or SMART-TD, which represents about 28,000 conductors, rejected the contract in a vote that garnered record turnout, the union said Monday. The contract was nixed by a slim margin, as just 50.8% of workers voted against it. The second-largest rail union, made up of engineers, voted...