"At a time when our country is at war and when our economy is recovering from a deep recession, it is more important than ever that DOD comply with the Berry Amendment," they wrote. "We should not rely on other countries, particularly those who many have competing global interests, to supply our forces with basic items.

"This is especially true when there are millions of Americans looking for work."

The letter, which Hunter and Michaud began circulating earlier this month, also reminded DOD that Congress first created the military preference for American-made items in 1941.