I would argue that in general Americans don't see that political power comes with any responsibility at all. JFK was a celebrity first (who's family bought him votes) and a president a long way second.

Trump ran for president because he felt that he had a responsibility to make things better. He has been very transparent about it. He has been the only president who lost money since (probably) Raegan.

Trump is a freak of nature, and until very recently half the country hates his guts for not being owned by the political establishment.