I think we're safer from nuclear war now, at least in the short-term. Hillary was going to continue the hard-line against Russia. Trump will likely come to a civilized agreement with them that deescalates the situation. There's no secret that he's Putin's favorite candidate (while the rest of Europe is in shock right now.)

More concerning is his policy with regard to Iran, but the current treaty covers our butts in the short term, while giving the Iranians a sure shot at nuclear capability down the road. Once they get nukes, the Saudis will want them too and the world will be a few minutes closer to midnight. It remains to be seen if Trump will make the situation better or worse.