Yes, he could have. The microwave oven was invented in 1946 by Percy Spencer. John F. Kennedy lived until November 22, 1963 so it is very possible that if he did not Own a microwave, he at least had access to one , so it is very probable that John F. Kennedy made microwave popcorn.
John F Kennedy ate popcorn while going for movies. So he must have made popcorn in a microwave oven and eaten in his lifetime atleast once.
He was shot
Lee Harvey Oswald
He was 45
Go on wikipedia
Rosa Parks was John F. Kennedy's mother .
Cuban missile crises.
He was pronounced dead at 2pm that day.
cuba
January 1961 - November 1963
john f. Kennedy was forty-six years old when he was shot on November 22,1963
He was assassinated by Lee Harvey Oswald from the sixth story textbook depository building