The Accidental President, I think I would find that insulting if I was Lyndon Johnson with all of his experience and qualifications to be President of the United States. And even though Vice President Johnson wasn’t a very active Vice President, because the Jack Kennedy White House kept him in hiding with very little if any responsibility as the 2nd Ranking Officer in the U.S. Government, he was still Vice President of the United States.
And according to the U.S. Constitution if the President can’t or doesn’t full fill their term as President and leaves office voluntarily or involuntarily, as was the case with President Kennedy, the Vice President takes over and becomes President of the United States. There was no accident to LBJ becoming President. He was Vice President at the time when President Kennedy was assassinated and JFK was assassinated as President of the United States. No accident in how LBJ became President of the United States and he was overwhelmingly elected President of the United States in 1964.