Voting for trump is like playing Russian Roulette with a revolver that only has a 5-round cylinder.
Voting for Hillary is like playing Russian Roulette with a bolt action rifle.
Trump is the nominee because people would rather back a genuine asshole with some balls than yet another of a long series of eloquent liars (assuming a working teleprompter in the case of the current disaster-muppet).
I dunno if I can honestly cast a vote for Trump, but since I don't loath both myself and my country, I certainly can't vote for a cancerous lesion that is a known traitor and empirically incompetent on top of that.