The deal announced on July 29 would put roughly 40% of the nation's rail freight in the hands of a single company.

Out of the roughly 3.5 million truck drivers on the road in the U.S. today, 140,000 could be removed from service under the Trump administration's new ELP requirements. 

While the present contract expires at 11:59 p.m. Central Time on Sunday, there’s a seven-day “cooling off” period before IAM Local 837 workers can walk off the job.