If anything, Trump will just ruin trade/foreign relations.
Yeah, I now get to find out if my Prime Minister, who hasn't done much yet, is actually capable of doing Prime Minister stuff. Given how much he publicly attacked Trump in the election, I think it would be a tough battle even if he was a more capable leader.
Sanctions are ineffective against small, impotent countries, let alone a superpower. I'm not surprised Putin just chuckled and ignored it. This has always been the case, or we wouldn't have had two world wars.
Clinton laid out some pretty solid plans for the deployment of nuclear weapons back in 2008. This kind of scenario was included (though it mostly focused on Iran). Despite what the media says, she was by far the worst choice.
Trump's just George Wallace in the modern age. Wallace spouted a bunch of racist shit, but when he did get elected (to governor in his case), he mostly ended up ignoring his platform outside of the public eye and doing useful things like building roads. Of course, rather than building roads, Trump's just gonna make himself rich, but Clinton has been doing that while holding an office for just about a decade anyway.