The "Day of Infamy" speech given by President Franklin D. Roosevelt on December 8th 1941, was given in front of the US Congress. His goal in giving this speech was to explain what happened and Pearl Harbor and ,more importantly, ask for Congress permission to declare war on Japan.
It is clear that this speech is supposed to paint the Japanese military in a negative light, as FDR calls the attack "cowardly" and "dastardly." Along with this, he is trying to invoke a sense of patriotism among the Congress, as this attack killed American soldiers/citizens. His speech rallies Congress behind this cause and results in Congress approving of war with Japan.
