But Quinnipiac pollster Peter Brown says that so far, there is little evidence to suggest that Obama got much of a public relations boost, or bounce, out of his trip.

• 奥巴马阵营本来希望他最近出访中东和欧洲地区能够为他在处理外交政策和国家安全问题的能力方面树立良好的形象。