sentences:  In July 1979, responding to a national energy crisis, President Carter delivered his "Crisis of Confidence" speech, urging Americans to reduce their energy use to help lessen American dependence on foreign oil supplies.Recently, some scholars have claimed that Carter's energy plan, if it had been fully enacted, would have prevented some of the current economic difficulties caused by the American dependency on foreign oil.President Carter, in his State of the Union Address on January 23, 1980, after stating that Soviet troops in Afghanistan posed "a grave threat to the free movement of Middle East oil," proclaimed