NEW : Leaks caused ` ` irreversible damage to our nation 's security , '' NSA ' says . `` These leaks have caused significant and irreversible damage to our nation 's security , '' Alexander said . NEW : A Venezuelan official questions his nation 's openness to accepting Snowden . President Obama says he does n't want to abandon efforts to get Snowden . Ecuador renounces U.S. trade benefits in the dispute over the Russian bid .
NEW : Leaks caused ` ` irreversible damage to our nation 's security , '' NSA ' says . NEW : A Venezuelan official questions his nation 's openness to accepting Snowden . President Obama says he does n't want to abandon efforts to get Snowden . Ecuador renounces U.S. trade benefits in the dispute over the Russian bid .