(I had to do a similar assignment for school myself, and though it’s been some time since I’ve watched Kennedy’s speech, these are some points I can remember off the top of my head! Feel free to change anything if you feel differently.)
Yes, Kennedy’s delivery of the speech affected the message he delivered. During his speech, Kennedy used strong vocabulary and put an emphasis on America as a whole coming together, as well as all the ways he was going to help America as president. He had a very genuine air about him the entire time. His delivery of his speech made his message much more powerful and convincing to the public.