DES MOINES, Iowa - Former Senate Democratic Leader Tom Daschle said Saturday that President Bush's presidency "is essentially over" but warned that Democrats can't count solely on Republican troubles to win in the next election. "I don't think it's enough for us to watch the Republicans self-destruct," Daschle said in an interview with The Associated Press. "I think it's important for us to set forth some ideas that give the party an opportunity to define itself and to contrast with Republicans." Daschle focused on increasing the use of alternative fuels and energy efficiency, and on repairing a health care system...