Former House Speaker Newt Gingrich conceded Wednesday that he might run for president in 2008, but said he will spend the coming years focusing on changes needed in the nation and less time talking about his own political ambitions. "The message I'm trying to send is we need to have a discussion over the next three years about really big changes," he said in an interview with The Associated Press. "We need some time spent by would-be political leaders talking about their vision for the future and answering big questions - before they run out and hire the consultants and...