Why does roosevelt use repetition in his request for a declaration of war? to highlight his own credibility to provide alternative courses of action to compare the experiences of countries to emphasize the threat posed by japan

Roosevelt used repetition in his Pearl Harbor Address in order to emphasize the threat posed by Japan. By repeating the words "Last night Japanese forces attacked..." several times, he was trying to intensify and stress the gravity and severity of the threat posed by Japan, so Congress would make the declaration of war and the American people would endorse such declaration.  

that is the way of a cheater and cheaters get nothing but bad grades and in trouble.