All fluff and show really... the supply chain crisis is faltering since last year due to issues in Asia really. Ships backing up outside of Long Beach is not because there is a U.S. fix to this problem....
Neither Biden nor DOT can shift the supply chain on a dime due to sudden spikes in demand and lack of capacity. Biden cannot waive a wand and make 100,000 new trucks and drivers appear on the road. A container can only come off a ship so fast and there are 70 ships waiting to unload and a full container yard of cargo already offloaded waiting to be trucked and railed out and thousand of warehouses waiting to have enough personnel to unload trucks and containers fast enought o send them back to the port etc....
This is a private sector issue with little DOT or Biden can do but I am sure he will wave his hands and claim he solved it. even worse, trump would have said he is the best logistics person in the world, knows all the players in Jina to fix it..