 Republican Party nominee John McCain and Democratic Party nominee Barack Obama did not agree to additional debates; however, each was interviewed at the Civil Forum on the Presidency, held on August 16, 2008, and at the Service Nation Presidential Forum on September 11, 2008.Their respective running mates, Sarah Palin and Joe Biden, did not participate in any additional debates.On Saturday, August 16, 2008, both McCain and Obama appeared at Pastor Rick Warren's Saddleback Church in California.