FDR/Winston Churchill Wartime Speeches

Please watch Winston Churchill's speech to the Joint Session of Congress during World War II and FDR's speech declaring war on Japan after Pearl Harbor.
 

What specific phrases or use of language did Churchill and FDR employ to both reassure the people that their government will fight for their democratic rights and to get the support from Congress to back the war efforts ? What other aspects of their speech and delivery stood out as being effective (For example tone, volume, inflection, pauses, pace, any physical gestures)?  What specific techniques and use of language conveyed why both leaders felt it critical to fight their enemies? What words did they choose to describe their enemies? How did Churchill and FDR try to convince British and American soldiers through their words or phrases, that the Allies would win the war?  What did he say that made the deepest impression on you? Be specific.

This has to be 1 and ½ to 2-page essay