Gosh, I don't know. Anger with what's happened to the US extends across the political spectrum. Some of those Sanders voters were registered Democrats, so that's the primary they voted in. I wouldn't be surprised if Trump captured a lot of votes of those who feel they were cheated by the process. Then there are people who voted for hillary because Sanders is too far left.
We just don't know. One thing is pretty certain. If the backstabbers steal the nomination from Trump, establishment Republicans aren't going to win anything.