Former Republican Lt. Gov. Steve Kirby says he will decide within the next week whether to challenge South Dakota Sen. Tim Johnson this November. "I'm undecided but I am working feverishly on trying to come up with a decision in the next seven days," Kirby said Thursday. South Dakota Republicans have been searching for GOP candidates to challenge Johnson this year. The Democrat's bid for a third term has attracted little attention as South Dakotans have focused on his recovery from a brain hemorrhage, and the election has been seen as Johnson's to lose. Kirby is more well-known than other...