The first debate between Republican U.S. Senate candidate Ken Buck and Democratic Senator Michael Bennet for the Colorado seat in the U.S. Senate was held on Saturday, September 11, 2010, by Club 20 at the Two Rivers Convention Center in Grand Junction, Colorado. The candidates responded to questions from a panel of Club 20 members and ABC News political director Amy Walter on the nation’s economy, the federal health care law, energy policy, and their campaign ads.