He wants to jail Clinton, because she has committed numerous felonies. And how has he been "actively undermining the legitimacy of the electoral process"? That's what Clinton did, remember? You know those Podesta emails that proved what everyone with a brain already knew? That Sanders never had a chance and the DNC had it rigged from the start?
http://truthinmedia.com/reality-check-trump-says-kill-terror...
He also advocates torture.
http://m.huffpost.com/us/entry/us_5775d740e4b04164640f6597