I'm physically ill by this result, but this isn't an option. You can't save democracy by discarding democracy.
Trump could do it because he's a fascist - he wants to discard democracy. A healthy system would have checked him not just then, but barred him from running again. We haven't had a healthy system in a long time.
They're voting for Trump because they've vaguely heard he's a good businessman (From who? Who possibly could be the source of this reputation?). It's just voting based on the general feeling of hearing the words "good businessman" and "better for the economy" alongside Trump.
The logic is more like, "I like leopards, I like to eat, and I like my face. I know who I'm voting for."