In a survey published in 2000, more than 80 percent of teachers indicated that a desire to work with children drove their decision to become teachers and 65 percent stressed the importance of teaching as a factor.
In the United States, someone has to be at least 35 years old in order to become President of the United States.
I think you're right about him being too old to become President. He would have been 83 if elected the first President of the United States. By that age, he could hardly walk and probably lost most of his hearing.