How are Americans preparing for the Trumpist supply shock?

From what I'm reading, the troubles should start to pick up now; harbors being quieter, truckers not having work, ... Are any shortages noticeable yet?

ETA:

Source: https://paulkrugman.substack.com/p/trump-is-a-virus

Businesses have been filling their inventories. That's ending now. Economic pain in terms of job losses should accelerate now. It will still take up to a few weeks before inventories run empty, and the full impact hits consumers. Even a full reversal of Trumpism couldn't prevent knock-on effects that last into next year.