The second of the two largest railroad unions still holding out on a new contract Wednesday. The tentative agreement orchestrated by a White House to prevent a railroad strike from disabling United State’s critical freight rail system.

The emergency tentative agreement came after three years of negotiations fell through. The White House barely avoided a strike back in September after Now that agreement has come to a vote and just over 60 percent of the 6,000-member Brotherhood of Railroad Signalmen voted it down, reports. The Signalmen is the to reject the proposal. The Brotherhood of Maintenance of Way Employees Division, which represents 23,000 workers, rejected the deal earlier this month with historic levels of member participation.

While other, smaller unions have agreed to the emergency recommendations, the two largest unions which actually run and repair the railways are holding outs over paid sick leave and days of doctor’s appointments. From CNN:

Rank and file members of the the signalmen union are mostly upset over the lack of paid sick days, said Baldwin.

“That’s the resounding message we heard everywhere,” he said. “Our guys worked through the pandemic. The employers made them quarantine at home and they didn’t get paid.”

In the past, therailunions agreed to higher pay in return for no sick days except for prolonged medical absences.The tentative deals do not change those provisions.

Members of six of the smaller railroad unions have ratified their contracts despite the lack of sick days. But it appears it could be a sticking point in crafting a deal that the BMWED and signalmenmembership will accept.

After BMWED rejected their tentative deal, union leadership proposed adding paid sick days during a bargaining session, only to have out of hand. Baldwin said he will make the same proposal at the negotiating table.

“I anticipate they’re going to tell me no as well,” he said. “They’ve denied us ability to bargain in good faith for three years. That’s not going to change now.”

The unions have a cooling-off period after voting down a contract, which puts the earliest date for a strike at November 19 or early December—just in time for the holidays. But it won’t just be holiday gifts that might be affected; over 40 percent of long-haul freight in the U.S. is moved by rail lines maintained and operated by members of these two largest unions. That includes items like gas, drinking water, and animal feed for factory farms. Amtrak on freight rail lines and will likely need to cancel its sight-seeing routes.

Congress could move to force an agreement between management and unions thanks to a 1992 amendment to the Railway Labor Act which allows Congress to end a strike or lockdown if it hurts the U.S. economy. Congress will likely act quickly to protect the U.S. economy from further potentially disastrous supply chain woes which might contradict President Biden’s pro-labor demeanor.

Still, there remains a great deal of anger in the union’s rank-and-file against management, which they say have cut corners and put lives at risk in the name of record profits.