Voters really were stuck with a catch-22 for presidential candidates: choose Clinton and get neo-cons and war; or choose Trump and get even more neo-cons and maybe less war (?). Voters didn’t so much elect Trump. Rather, they voted against Clinton.
I think where Trump will go wrong is he will have extreme right-wingers like Gingrich, Bolton, and Guiliani on his team. This will be a disaster if it comes to pass.