Mr Bush tainted America's values with inept invasion, prisoner abuse and imperial overstretch.
布什政府因不当入侵，虐囚，以及强权扩张，玷污了美国的价值观。
英语百科
Imperial overstretch
Imperial overstretch, also known as Imperial overreach, is a hypothesis which suggests that an empire can extend itself beyond its ability to maintain or expand its military and economic commitments. The idea was popularised by Yale University historian Paul Kennedy in his 1987 book The Rise and Fall of the Great Powers.