Hillary Clinton : Obama administration trying to improve ties with even harshest countries . U.S. having to counter attacks by China , Russia and Iran in Afghanistan , Clinton says . Secretary of State : President Bush 's efforts to isolate certain leaders failed . Clinton : In wide-ranging comments on the region , she also said the Obama administration will work to improve relations among even its harshest critics in the Western Hemisphere , including Venezuelan President Hugo Chavez , and is looking to the Castro brothers in Cuba for some reciprocal action in response to the president 's easing of travel and other restrictions . U.S. awaiting response from Castro brothers in Cuba .
Hillary Clinton : Obama administration trying to improve ties with even harshest countries . U.S. having to counter attacks by China , Russia and Iran in Afghanistan , Clinton says . Secretary of State : President Bush 's efforts to isolate certain leaders failed . Clinton : U.S. awaiting response from Castro brothers in Cuba .