Genetically engineered wheat is not sold in the U.S. so the USDA is investigating how the engineered wheat got there. It is the same strain of Monsanto grain that passed tests a decade ago but it has never been submitted for approval to be sold.
Three countries, including Japan, suspended imports of western white wheat from the Pacific Northwest while the USDA investigates. That's okay, we don't buy produce from Fukushima prefecture either - at least our mutations are controlled.
USDA: Modified Wheat in Oregon Appears to be Isolated - AP