There were a few weeks when media-created fear of shortages led to toilet paper hoarding and a period of empty shelves...for which the morons blamed Trump.
Actually it continued a very long time.
Because they artificially stopped production and shipping due to this hysteria. No one was allowed to work, thus make anything, or ship anything.
The hoarders (backed by anti-gouging foolishness) started it, but within a month it was regular because of the restrictions on business.