Conservative intellectuals and commentators who once lauded Bush for what they saw as a willingness to aggressively confront threats and advance U.S. interests said in interviews that they perceive timidity and confusion about long-standing problems including Iran and North Korea, as well as urgent new ones such as the latest crisis between Israel and Hezbollah. "It is Topic A of every single conversation," said Danielle Pletka, vice president for foreign and defense policy studies at the American Enterprise Institute, a think tank that has had strong influence in staffing the administration and shaping its ideas. "I don't have a friend...