or why don't I recall any such supply chain problems under the last administration?
Forget What You're Being Told. Here's the Real Reason for California's Trucker Shortage.
The immediate problem, the one in Los Angeles, has been caused by the state’s vindictively regulatory state government.
We’ll get to the trucker shortage in just a moment, but California also faces a shortage of trucks for them to drive.
Twitter user Jerry Oakley
reminds us that “Carriers domiciled in California with trucks older than 2011 model, or using engines manufactured before 2010, will need to meet the Board’s new Truck and Bus Regulation beginning in 2020.” Otherwise, “Their vehicles will be blocked from registration with the state’s DMV,” according to California law.
“The requirement is to purchase electric trucks which do not exist.”
As a result, trucks aren’t being purchased to replace the ones being regulated out of business.
But even if there were plenty of trucks in California, there wouldn’t be enough truckers to drive them — and it isn’t because the truckers are too old.
“Traditionally the ports have been served by Owner Operators,” Oakley says, who are non-union. But under AB-5, “California has now banned Owner Operators.”
Just like the union longshoremen, union truckers work under a whole host of work rules that simply can’t accommodate crisis conditions like the ones in Los Angeles.
I consolidated and tossed 5 empty containers in the trash. 
