Railroad companies, meanwhile, have refused to budge on issues like paid sick leave and have not indicated that they are willing to resume negotiations, raising the possibility of intervention by the United States Congress to avoid a massive strike that could roil the country’s supply chain.The vote comes amid an uptick in labour organising in the US, as workers push for greater compensation and better working conditions.A rail shutdown could freeze up to 30 percent of US cargo shipments by weight, impacting various sectors such as agriculture, manufacturing and retail.Biden’s Presidential Emergency Board issued a 124-page report in August that laid the groundwork for the five-year contract deal.The group that negotiates on behalf of railroad companies stated on Monday that unions should not expect to receive more than was outlined by the emergency board."