"Meat from foreign sources accounts for roughly 8-20 percent of total U.S. meat supplies, but only the portions that are imported directly as meat are obvious. While it is relatively easy to track the amount of meat imported by the U.S. (2.1 billion pounds of beef and 0.8 billion pounds of pork in 2011)"
USDA ERS - How Much U.S. Meat Comes From Foreign Sources?
If you snoop around that site, you'll find spreadsheets and other files that break it down further.
It doesn't mean that we need to import it, we have trade deals with other countries. (just like Russia) and in some cases, the imported meat has a specific grade or use and can be had at less expensive price.
