 if any person or persons , owing allegiance to the United States of America , shall levy war against them , or shall adhere to their enemies , giving them aid and comfort within the United States or elsewhere , and shall be thereof convicted , on confession in open court , or on the testimony of two witnesses to the same overt act of treason whereof he or they shall stand indicted , such person or persons shall be adjudged guilty of treason against the United States , and shall suffer death . 
