This is a classic fact check where they admit the basis of the claim is true, but then deny the impact and call it mostly false.
They might be right about the impact, they might not, it is a complicated system that is fudged up. I doubt there is a single cause. But, if you believe the OP, that lack of trucks is big part of the problem today, then the fact checkers are most likely wrong and should update.
I wish people would stop citing politifacts articles as if there were something other than partisan editorials.
From their own "fact check":
"Industry experts said the rules certainly impact the availability of drivers and trucks, but acknowledged that many other issues are impacting the movement of goods through U.S. ports."
>Industry experts said the rules certainly impact the availability of drivers and trucks, but acknowledged that many other issues are impacting the movement of goods through U.S. ports.
