Hillary is not a psychopath, just a garden variety sociopath. The difference between them, a forensic psychiatrist once explained to me, is one of commitment to intent. A sociopath would be your spy assassin or your organized crime hit man or your burglar who doesn't mind killing you to, say, eliminate a witness. A psychopath WANTS to kill you, lives for the thrill and joy of killing you. Ted Bundy and Jeffrey Daumer were psychopaths.
I doubt if Hillary would have the guts to push the button without a coterie of advisors to assure her and provide her with reasons why it, regrettably, has to be done. Sociopaths are often very successful. Their minimalized consciences gives them an advantage in business and financial dealing.