WASHINGTON, Dec. 10, 2009 – Among the many factors White House and Pentagon officials say will drive success in Afghanistan, developing a credible government there may be the most challenging, the commander of U.S. and international forces there said yesterday. For sustained progress in Afghanistan, the country’s government must be seen as credible and legitimate among its people, Army Gen. Stanley A. McChrystal said in an interview with National Public Radio. The general compared the fight in Afghanistan to a political campaign. “All insurgencies and counterinsurgencies struggle for the support of the people,” he said. “It’s really winning credibility and...