The White House is monitoring labor talks in the logistics industry as unions representing 115,000 rail workers and 22,000 West Coast dockworkers negotiate fresh contracts, but won’t get directly involved in either bargaining process now, its supply chain envoy said.

Truckers servicing the California port gateways of Los Angeles, Long Beach and Oakland staged protests July 13 as state-level labor rules that change their employment status begin to go into effect, creating another potential choke point in stressed U.S. supply chains.