because he lost the Democratic primary, Cone was not listed on the ballot under the state's sore loser law. Graham easily won re-election with 58% of the vote to Conley's 42%. South Dakota In South Dakota, senator Tim Johnson's seat was considered a top GOP target in 2008, considering Johnson's narrow 524-vote victory in 2002 over then-Representative and current U.S. senator John Thune, as well as his recent health problems. Johnson underwent surgery in December 2006 for a cerebral arteriovenous malformation and was discharged from the hospital on April 30, 2007. On October 19, 2007, Johnson formally announced that he was seeking re-election. According to a November 2006 SurveyUSA poll, Johnson had an approval rating of 70%, with just 26% disapproving of his performance, making him an early favorite despite the state's Republican leaning. Republicans were unsuccessful in persuading Governor Mike Rounds and former Lieutenant Governor Steve Kirby to run. State Representative Joel Dykstra announced his candidacy on July 5, 2007. Other Republicans included Charles Lyonel Gonyo and Sam Kephart. Dykstra won the Republican primary on June 3. Johnson was re-elected, with 62.5% to Dykstra's 37.5%. This seat was the tipping point state in the 2008 senate elections. Tennessee Former Governor and U.S. Secretary of Education Lamar Alexander was elected in 2002 to succeed retiring senator Fred Thompson. He has announced he will seek a second term in 2008. He was unopposed in the Republican primary. Former Chairman of the Tennessee Democratic Party Bob Tuke was the Democratic nominee, defeating Businessman Gary Davis 30% to 23%. Knox County Clerk Mike Padgett received 20% of the vote. 2006 Green Party Senate nominee Chris Lugo originally announced as a Democrat but dropped out of the Democratic race before the filing deadline. He filed as an independent and was subsequently named as the Green Party nominee Edward Buck was also in the race. Daniel Lewis ran as a Libertarian candidate for the United States Senate. He was certified March 3, 2008, by the Tennessee Division of Elections as having achieved ballot access for the November 4, 2008, election as a candidate for United States Senate. The Libertarian Party of Tennessee officially selected Daniel Lewis as their candidate for United States Senate on Saturday March 8, 2008, at their annual convention held in Nashville, Tennessee. Mr. Lewis was serving as the chairman of the Libertarian Party of Metropolitan Nashville and Davidson County. He ran