The article, based on analyses of current political environment and the features of 2006 mid-term election in U.S., discusses the causes of the Democrat's victory and the impacts of the change in the Congress on American future domestic and foreign policies. The author holds that Democrats recontrol of both houses of the United States is a reflection of voters' strong dissatisfaction with Bush's Iraq policy and corruption scandals from the Republicancontrolled Congress, the conservatives' opposition against budgetary and social policies and Hispanic voters' anger with immigration policy. The change in congress would exert some impacts on U.S. domestic and foreign policies in the coming two years. However, the constituents who back either of the two parties basically did not change, the trend of American political and social thinking did not change, either. Therefore, Bush Administration may not make radical readjustments in its domestic and foreign policies in the remaining two years.