"Little Johny is back" joke

One Friday morning, a teacher came up with a novel way to motivate her
class. She told them that she would read a quote and the first student
to correctly identify who said it would receive the rest of the day off.
She started with
"This was England's finest hour."
Little Suzy instantly jumped up and said, " Winston Churchill."
"Congratulations said the teacher you may go home."
The teacher then said,
"Ask not what your country can do for you."
Before she could finish this quote, another young lady belts out,
"John F. Kennedy".
"Very good" says the teacher, "you may go."
Irritated that he has missed two golden opportunities, Little Johnny
said, "I wish those little twits would just shut the hell up."
Upon overhearing this rude comment, the outraged teacher demanded
to know who said it.
Johnny instantly rose to his feet and said, "Bill Clinton."
"I'll see you Monday..."