@RebEliezer
You don’t quite understand the 22nd Amendment to the US Constitution.
Your statement that no one can be president more than 8 years is false.
One can only be elected to 2 Four Year terms. BUT, If a person (usually the VP) assumes the Presidency upon its vacancy (Death, Resignation) for no more than two years, that President may be elected twice and serve for no more than TEN years total.
“No person shall be elected to the office of the President more than twice, and no person who has held the office of President, or acted as President, for more than two years of a term to which some other person was elected President shall be elected to the office of the President more than once.”