What has the United States learned from having Donald Trump as president?

@SW-User Thats a little harsh.. Many politicians are con artists and some are quite gifted. Boris Johnson has a whole affable persona he never puts down for a moment. Trump is actually not a con arist, in that he is totally transparent in his lying, cheating and stupidity. Its the mix of his Damaged pyche and underlying insecurity, the fact he was born into a rich family, and the US culture that says making money is the only thing that matters and the only way to define winning that has allowed him to succeed😷