Republicans have broken voter turnout records in every state so far. I'm pretty sure that is the result of the Trump phenomenon. I'm also pretty sure a lot of his supporters will disappear with him if he loses the nomination. I know how much a lot of you dislike Trump, but at this point he is probably the best bet for a Republican win.
Republicans have a decades long string of following that strategy by picking the candidate who is the so called most electable rather than the candidate who stands for something. And they've won 2 of 6 elections doing that.
You are just proposing the losing strategy Republicans already keep following unsuccessfully. What's the point in that?