Americans, particularly the less educated are very gullible and...

Americans, particularly the less educated are very gullible and hence America is a paradise for salesmen/conmen.

Trump is a very good conman, probably one of the best ever. Says a lot about America that a lying piece of shit conman suckered enough people to become president.

And the fact that his supporters still supporting him despite all his crimes and that he is ranked the worse president in history is baffling, can only be that they are part of a cult and as @noddan says "Cult members will staunchly defend their leader even when his or her crimes are exposed”