The meaning of a leader is being worthy and having a very big quality of trust on your shoulders and using your mind to control that trust and fulfill it as you lead people that trust your thoughts.
The thing that makes a good leader is that you never give up and inspire and encourage people to do their best. If your a leader will followers your their inspiration.
John had great inspiring speeches that made people love him as a president. One of his most famous speeches was the nuclear test ban treaty. John and khrushchev reopened a dialogue banning nuclear testing.