Politics | Barack Obama Clinton Wins South Dakota, But Victory Comes Too Late She wins state primary after Obama clinches nomination By John Johnson Posted Jun 3, 2008 8:47 PM CDT Copied Democratic presidential hopeful Sen. Hillary Rodham Clinton, D-N.Y., speaks at a campaign event in Yankton, S.D., Monday, June 2, 2008. (AP Photo/Elise Amendola) Hillary Clinton has won the South Dakota primary, CNN reports, but the victory is a hollow one: It follows news that Barack Obama clinched the Democratic nomination. With 99% of returns in, Clinton led 55% to 44%. Exit polls showed that 60% of Clinton supporters would vote for Obama in the fall, while 34% would either vote for McCain or sit it out. Results from Montana come later tonight to mark the official end of the primary season. In other exit polls from South Dakota, voters aged 18-29 backed Obama 65% to 35%, while voters 65 and older supported Clinton by the same percentage. Also, 55% of voters say the long campaign has "energized" the party, while 39% say it has hurt. Read These Next Meet the Oscar winner who says the award injured her career. Researchers jumped in car to investigate cow tools. Study suggests out who's paying for tariffs: Americans. Trump appears to be trying to build an alternative to the UN. Report an error