Presidential Candidates

I'm going to admit, before I really get into anything, that I don't really follow politics. That also includes the presidential race. It's not that I don't think it's important, but for me, I don't really think any of the candidates are that great and I'm already a bit tired of the campaign ads and such.
That said, if I had to say which one of them seemed to have the most firm ethical standards, it seems like Carson. He seems pretty in touch with his own personal code of ethics.
On the other end of the spectrum, the candidate with the most relativistic and situational ethics to me seems like Trump. Right now, a lot of people have disdain for him because of how harsh and eccentric he is. But, Machiavelli says in The Prince that, '...in seizing a state, the usurper ought to examine closely into all those injuries which it is necessary for him to inflict, and to do them all at one stroke so as not to have to repeat them daily; and thus by not unsettling men he will be able to reassure them, and win them to himself by benefits.' It could be that Trump will mellow out if he is elected, and the people will mostly forget about his present actions. And, people also consider his remarks on immigration to sound exceptionally cruel and fear what legislation he might enact while in office, but Machiavelli also says '...it is far safer to be feared than loved if you cannot be both.' And, not to sound rude, but it's hard for me to see Trump as being loved, considering the current backlash against his campaign.
It's hard to say which kind of ethics is better for a president. On the one hand, people want a president to act ethically, but on the other hand, a president should be a strong leader, and some would say that a strong president would do what is needed, even ignoring the law in doing so. But I think I'd rather have a president who didn't have more situational ethics because I'd be worried that he/she would be more of a dictator than a president.