At this point, even if Hillary, or Trump, was Hitler, it would not make much difference because America is not interbellum Germany.
America has a system of government that does not lend itself well to totalitarian control from the position of presidential "dictator".
As a result, Obama's legacy is being erased even as his last days wind down, because without the cooperation of Congress, all that he has done is through executive order, which can be erased just as easily as a presidential decree has set them forth. And anything that cannot pass the muster is already being disassembled by the courts.
To change this for any presidential hopeful, first, America must be changed. People must stop believing in their freedoms. Courts must stop believing in constitutional precedence. Institutions must stop believing in rule of law.
Trump has proven himself to be a bombastic fool, and as such, he is incompetent to the job at hand. He may like the idea of strong men such as Putin, but for him that is mere fantasy. He is weak, unfocused, and driven by insecurities more than by agenda.
Under HRC, America is already changing. From the FBI to the IRS, rule of law means nothing anymore, as these institutions have become politicized in order to enable Obama and Clinton and that administration.
And courts will be changed soon enough, as old judges die off and new ones are appointed. Probably worse, people don’t even much care, as long as it is Democrats that are being enabled, and tea party types that are being castigated. People no longer identify themselves as Americans, but as members of special interest groups, that feel quite morally superior as they sit on their thumbs during the raising of the flag.
But even then, America is still not Germany as Hitler entered on the scene.
America has got guns, and people who know how to use them.
That is a big, big difference, that would leave even megalomaniacs like cowardly Hitler quaking in their boots.