U.S. Senator John Boozman (R-AR) asks Dr. Joseph W. Glauber, Chief Economist of the US Department of Agriculture, how factors such as ethanol production, unratified trade pacts and the lack of a national energy policy are impacting the livelihoods of livestock producers at U.S. Senate Agriculture Committee hearing entitiled "The State of Livestock in America" on June 28, 2011.